Answer:
Structural
Explanation:
Isomerism is the existence of two or more compounds with the same molecular formula but different molecular structures due to the difference in the arrangement of atoms or spatial orientation of atoms.
Isomers have the same molecular formula but differs in their structural arrangement.
In organic chemistry, Isomerism can orginate from different arrangement of atoms.
It can be carbon chain length known as chain isomerism. Here, the carbon length is changed and arranged in different ways.
We can also have position isomerism which entails the position of the functional group in the structure.
It can also be functional group isomerism which deals with the possible arrangement of the group on the chain.
Isomers have the same molecular formulas but different structural formulas. This different structural arrangement leads to differences in the physical and chemical properties of the isomers.
Explanation:Isomers are molecules that have the same molecular formula, meaning the same number and type of atoms, but different arrangements of atoms within the molecule. Hence, isomers have different structural formulas, which are used to represent the three-dimensional arrangement of atoms in a molecule. For instance, the compounds butane and isobutane both have the formula C4H10, but in butane, all four carbon atoms are arranged in a row, while in isobutane, three carbon atoms form a branch off a central carbon atom. Therefore, the structural formulas of these compounds differ, even though the molecular formula is the same.
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The whale shark has rows of teeth despite being a filter feeder. What's the best explanation of this feature?
A. The whale shark's teeth are an example of vestigial structures. If an inherited feature is no longer needed but also not harmful, there's no evolutionary pressure to get rid of it.
B. The whale shark's teeth are an example of analogous structures. Teeth exist in almost every sea creature, and the whale would be at a defensive disadvantage without them.
C. The whale shark's teeth are an example of homologous structures. Other mammals also have teeth, and different teeth in humans have different shapes to serve different functions.
D. The whale shark's teeth are an example of embryonic structures. The teeth buds develop early enough in embryogenesis that the whale shark is still born with teeth.
Answer:
The whale shark's teeth are an example of vestigial structures. If an inherited feature is no longer needed but also not harmful, there's no evolutionary pressure to get rid of it.- A.
Answer:
The correct answer is option A, that is, the whale shark's teeth are an example of vestigial structures. If an inherited feature is no longer needed but also not harmful, there's no evolutionary pressure to get rid of it.
Explanation:
The vestigial structures refer to the compositions, which exhibit no ostensible activity and seems to be the leftover components from a past ancestor. Some of the examples of vestigial parts are the pelvic bone of a snake, the human appendix, and the wings of flightless birds.
From the solubility curve, which salt shows the least change in solubility as the temperature increases?
Answer:NaCl (Sodium Chloride )
Explanation:As it has Solubility 35.7
Answer:
NaCl
Explanation:
Animals need food air and water.which of the following is another need of animals
Answer:
a habitat
Explanation:
The correct answer is shelter and their right climate is another need of animals.
What are some of the animals' most basic requirements?Animals have four essential needs: air, water, food, and shelter. Living creatures have the following basic requirements: Sunlight: Because it is the source of all energy, this is undoubtedly the most important need for all living species.Learn more about the basic needs of animals here:-
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Using complete sentences, why do you think we need to use time zones on earth?
Great Question! i'm going to break this down first. So the earth spins on its pole which is called the axis and every 24 hours the earth makes a full rotation on it. Remember, the sun and the moon don't move around our planet. We get our light and darkness because the Earth spins and when it does, the moon is on one side and the sun is on the other. Let's get back to your question. "Why Do We Need Timezones?" We need them because if all the people on Earth set the clocks to the same time, noon would be the middle of the day in some places but in other places, it would be morning evening and the middle of the night. Since different parts of our Earth enter and exit daylight we need different timezones. That is why we have 24 time zones on planet Earth.
What is the Fraction Remaining of a sample that is 5 half lives old?
Answer:
The fraction remaining of a sample that is 5 half lives old is 0.03125.
Explanation:
It is known that the decay of a radioactive isotope isotope obeys first order kinetics.Half-life time is the time needed for the reactants to be in its half concentration.If reactant has initial concentration [A₀], after half-life time its concentration will be ([A₀]/2).Also, it is clear that in first order decay the half-life time is independent of the initial concentration.Suppose the initial concentration of the sample is 1:So, it will decay as:
1.0 → (first half life) 0.5 → (second half-life) 0.25 → (third half-life) 0.125 → (fourth half-life) 0.0625 → (fifth half-life) 0.03125.
So, the rraction remaining of a sample that is 5 half lives old is 0.03125.
The Grand Canyon becomes deeper every day. What causes the canyon to
become deeper?
Answer: Flowing Water
Explanation:
Answer: Flowing Water
Explanation:
Which of the following is least able to transfer electrons?
Answer:
insulators
Explanation:
Insulators are meant to stop the conduction of electricity using materials that are non-conductive, like rubber, glass, or cable covers.
Help please ❤️ When O2 is added to the melted candy mixture once it has cooled. Why would it not be beneficial to add the CO2 after it is first melted?
it wouldnt have an effect?
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A flask contains a gas mixture of hydrogen, nitrogen and methane. The total
pressure of the mix is 3.0 atm. The partial pressure of the hydrogen is 0.5
atm, and the partial pressure of the methane is 1.5 atm. What is the partial
pressure of the nitrogen?
OA) 0.8 atm
OB) 1.0 atm
OC) 1.6 atm
OD) 2.0 atm
Answer:
1 Atm
Explanation:
Dalton's law
The total pressure is 3 Atm so all you have to do is subtract the other partial pressures from 3
Answer:
OB) 1.0 atm
Explanation:
we have a mixture of hydrogen, nitrogen and methane and we have the following data
[tex]P_t= 3.0 atm[/tex]
[tex]P_H=0.5atm\\P_{CH_4}=1.5 atm\\P_N=?[/tex]
According to the law of Dalton the sum of the partial pressures of each gas is equal to the total pressure
Total pressure equation
[tex]P_t=P_H+P_{CH_4}+P_N[/tex]
now we clear the partial pressure of nitrogen from the equation
[tex]P_t=P_H+P_{CH_4}+P_N\\P_t-P_H-P_{CH_4}=P_N\\3amt-0.5atm-1.5atm=P_N\\1atm=P_N[/tex]
the partial pressure of nitrogen is 1 atm
the correct answer is OB) 1.0 atm
what is the most common mineral group in the earths crust
Answer:
The silicates
Explanation:
The silicates are the most common mineral groups on the earth crust. They account for a bulk 90% of all rocks and earth materials we find on our thin crust.
The silicates are made of the fundamental unit which is the SiO₄⁴⁻ tetrahedron. This forms the basic unit through which other elements combine with them. The silicates makes up the bulk of sands we have as silica.
The tetrahedron makes silicates unique and able to combine readily with other elements to form a wide range of minerals.
Most rocks found on the earth surface and in the crust are for their most parts made up of silicate minerals. Some of these minerals are olivine, quartz, beryl, phlogopite, feldspars etc.
Paraffins are the simplest _______ series, where the difference between each member of the series is a simple structural unit. A. aliphatic B. ketone C. homologous D. aromatic
Paraffins are the simplest homologous series, where the difference between each member of the series is a simple structural unit.
C. Homologous
Paraffins:It is also referred to as alkanes, are saturated compounds that have the general formula [tex]C_nH_{2n+2}[/tex], where n is the number of carbon atoms. The simplest alkane is methane ([tex]CH_4[/tex]), which is also represented as C-1. Normal paraffins are unbranched straight-chain molecules. It could be the number of monomers in a homo-polymer such as amylose.
Thus, correct option is C.
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Which of the following is not an indication of chemical change ?
A.fracture formation b.precipitate formation
C.gas production
D.energy transfer
Answer:
I think it is A.
Explanation:
Hope my answer has helped you!
How many moles of NaCl could be made by combining 20,000 moles of Na with 2 moles of CI?
a 20,000 moles Naci
2 moles Naci
b. 1 mole NaCl
None of the above
Please select the best answer from the choices provided
A
B
C
D
Answer:
None of the above.
Explanation:
The limiting factor of this is the chlorine. You only have 2 moles of chlorine.
2Na + Cl_2 ==> 2*NaCl
The equation tells you that for every mol of Cl2 that you have, you require 2 moles of Na and you get 2 moles of NaCl
So what that means is that if you have 2 mols of Cl2, you need just 4 moles of Na, and you will get 4 mols of NaCl
Since 4 is not one of your choices, the answer is none of the above
what do scientist think caused the mass extinction of dinosaurs
Answer:
There are several theories to the extinction of the dinosaurs. One of the most supported ones are the impact of a meteor near Mexico that caused ashes to enter the atmosphere. These ashes led to a decrease in global temperature since it prevented sunlight from entering. There are many different minor theories that aren't as backed up as the meteor one.
About 65.5 million years ago was the start of the end of the age of the dinosaur. We know now that there was a meteor strike that happened 65.5 million years ago in Latin America and most scientists believe that or that plus a few other things is was initiated the collapse of the age of the dinosaur and initiated the rise of mammals which then leads to us. So 65.5 million years ago, there was an extinction event which scientists believe it was a meteor.
It most likely didn't kill all the dinosaurs immediately. It most likely altered the atmosphere and possibly caused a couple thousand years of a nuclear winter where the sun was blocked out if you can imagine that in your head.
The meteor was about 6 miles wide which doesn't sound like a lot to cause a mass extinction like this but it happened. So that large object striking the earth caused this havoc.
We know when this happened and where it happened.
Years ago, geologists started to notice that there was a thin layer almost like a layer of icing that existed in the same age all over the earth. Now, there is an element called iridium and it doesn't exist on earth. It only exists in outer space and so it had to be brought here and the thought is that this meteor mainly added this element and when it hit, it dispersed and it left this layer all over our planet so it's almost a fingerprint. So we know that this layer exists at 65 million years everywhere on earth and that's associated with this meteor.
The meteor hit in Latin America. The Gulf of Mexico is a meteor crater and that's where it hit and it hit about half on land and half in water.
If that didn't happen, there is a highly likelihood that dinosaurs would still be here. There is no reason why they wouldn't be and they would have evolved in any way they could have evolved in 65 million years and would still be here. However, mammals wouldn't be here.
Elizabeth is getting ready to run a marathon why is her thinking incorrect
Answer:
Oh, I don't run
Explanation:
Alex Russo
Elizabeth is getting ready to run a marathon, her thinking incorrect due to lack of training and unrealistic Expectations.
Lack of Training: Marathon runners need to be properly trained and condition themselves. Elizabeth's reasoning can be flawed if she hasn't had enough training since she might underestimate the physical difficulties and the risks involved in the marathon. Without adequate training, she can experience fatigue, injuries, or other health problems while competing.
Elizabeth might have exaggerated expectations on how well she will perform in the marathon. She would be mistaken in her reasoning, for instance, if she thought she could run the marathon in a relatively short amount of time without any training or prior experience. Setting reasonable objectives that take into account one's ability and level of fitness is crucial.
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A metal has a mass of 8.7 grams and a volume of 3.2mL is it metal gold ?
Answer:
The metal is not gold.
Explanation:
It is known that the density of gold (d) = 19.32 g/mL.We need to calculate the density of the given data of the metal and compare with the theoretical density value:Density (d) = mass/volume
∴ d of metal = mass/volume = (8.7 g)/(3.2 mL) = 2.72 g/mL.
So, the metal is not gold.
13. A gas occupies 4.31 liters at a pressure of 0.755 atm. Determine the volume if the
pressure
is increased to 1.25 atm.
14. 600.0 mL of a gas is at a pressure of 8.00 atm. What is the volume of the gas at 2.00
t
.
Answer:
13. 2.60 L.
14. 2.40 L.
Explanation:
We can use the general law of ideal gas: PV = nRT.
where, P is the pressure of the gas in atm.
V is the volume of the gas in L.
n is the no. of moles of the gas in mol.
R is the general gas constant,
T is the temperature of the gas in K.
If n and T are constant, and have different values of P and V:
(P₁V₁) = (P₂V₂)
13. A gas occupies 4.31 liters at a pressure of 0.755 atm. Determine the volume if the pressure is increased to 1.25 atm.
P₁ = 0.755 atm, V₁ = 4.31 L.
P₂= 1.25 atm, V₂ = ??? L.
∴ V₂ = (P₁V₁)/(P₂) = (0.755 atm)(4.31 L)/(1.25 atm) = 2.60 L.
14. 600.0 mL of a gas is at a pressure of 8.00 atm. What is the volume of the gas at 2.00 at m.
P₁ = 8.0 atm, V₁ = 600.0 mL.
P₂= 2.0 atm, V₂ = ??? L.
∴ V₂ = (P₁V₁)/(P₂) = (8.0 atm)(600.0 mL)/(2.0 atm) = 2400/0 mL = 2.40 L.
Using Boyle's law, which states that the pressure and volume for a gas is a constant if the temperature is constant, we can determine that the new volume of the gas occupying 4.31 liters at 0.755 atm when the pressure is increased to 1.25 atm is 2.62 L. Similarly, when the pressure of a gas occupying 600.0 mL at 8.00 atm is reduced to 2.00 atm the new volume will be 2400 mL.
Explanation:To solve these problems, we can use the principles of Boyle's law, which states that the product of the pressure and volume for a gas is a constant if the temperature and the amount of gas remain unchanged. In other words, P1*V1 = P2*V2.
Problem 13
Let's use Boyle's law to calculate the new volume (V2) when the pressure (P2) is increased to 1.25 atm (P2). We know that the initial volume (V1) is 4.31 L, and the initial pressure (P1) is 0.755 atm.
V2 = P1*V1/P2 = (0.755 atm * 4.31 L) / 1.25 atm = 2.62 L
Problem 14
The initial volume (V1) is 600 mL and the initial pressure (P1) is 8.00 atm. The new pressure (P2) is 2.00 atm. So, we can calculate the new volume (V2) as:
V2 = P1*V1/P2 = (8.00 atm * 600.0 mL) / 2.00 atm = 2400 mL
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Need help on this ASAP !!!!
Answer:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O.
Explanation:
To balance the equation, you should apply the law of conservation of mass for the equations.
The law of conservation of mass states that the no. of each atom is equal in both sides (reactants and products).
Hydrocarbon is burned in oxygen to produce CO₂ and H₂O.
So, the given equation is balanced as:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O.
that 1.0 mole of C₃H₈ is burned in 5.0 moles of O₂ to produce 3.0 moles of CO₂ and 4.0 moles of H₂O.
The no. of all atoms is the same in both of reactants and products side.
C (3), O (10), and H (8).
What is the force of attraction that holds atoms together?
Strong chemical bonds are the intramolecular forces that hold atoms together in molecules. A strong chemical bond is formed from the transfer or sharing of electrons between atomic centers and relies on the electrostatic attraction between the protons in nuclei and the electrons in the orbitals.
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The atoms are primarily held together by strong nuclear forces and electromagnetism. The strong nuclear force binds the particles in the nucleus, while electromagnetism acts on a larger scale, holding atoms together, especially in covalent bonds. Other forces like dispersion forces also play a role when molecules are very close.
Explanation:Atoms are held together by a few different forces, with the main two being the strong nuclear force and electromagnetism. The strong nuclear force keeps the particles of the nucleus, the nucleons, tightly bound together. This force is very strong, but it falls to zero over a distance of only 10-¹5 meters.
On the other hand, electromagnetism, which includes both magnetic and electrical forces, holds the atoms together at a larger scale. These forces occur between the positive charge of the atomic nucleus and the negatively charged electrons surrounding it. This is especially evident in covalent bonds where pairs of atoms share electrons.
Another type of force, although weaker, are dispersion forces that develop between atoms in different molecules when the molecules are very close.
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How many electrons does carbon have?
Answer:
[tex]\boxed{\text{Six}}[/tex]
Explanation:
Carbon is element number six, so it has six protons.
[tex]\boxed{\textbf{A neutral atom of carbon then has six electrons.}}[/tex]
a substance is classified as an electrolyte because
Answer:
It can conduct electricity when dissolved
Explanation:
Final answer:
A substance is classified as an electrolyte if it dissolves in water to produce a solution that can conduct electricity due to the presence of ions. Strong electrolytes dissociate completely, whereas weak electrolytes only partially dissociate.
Explanation:
A substance is classified as an electrolyte because it produces electrically conducting solution when dissolved in water or another polar solvent. Such substances undergo either a physical or a chemical change that yields ions in solution, which are then able to move and conduct electricity. Nonelectrolytes, on the other hand, do not yield ions when dissolved.
There are also distinctions between strong electrolytes and weak electrolytes. A strong electrolyte dissociates completely into ions, leading to high conductivity, whereas a weak electrolyte only partially dissociates, resulting in lower conductivity. Thus, the strength of electrolytes is related to the efficiency of the ion-producing process when the substance is dissolved in a solvent like water.
The image shows information about the element carbon as it appears in the periodic table. Based on the image, how many protons does carbon have?
Answer:6
Explanation:
U welcome
Need help on this ASAP !!!!
Answer:
0.1612 mol.
Explanation:
From the balanced equation:2Ca₃(PO₄)₂ + 6SiO₂ + 10C → 6CaSiO₃ + P₄ + 10CO.
2.0 moles of Ca₃(PO₄)₂ react with sufficient SiO₂ and C to produce 1.0 mole of P₄ and other products.
we need to calculate the no. of moles of 100.0 g of Ca₃(PO₄)₂:no. of moles of Ca₃(PO₄)₂ = mass / molar mass = (100.0 g)/(310.18 g/mol) = 0.3224 mol.
Using cross-multiplication:
2.0 moles of Ca₃(PO₄)₂ produce → 1.0 mole of P₄.
0.3224 mole of Ca₃(PO₄)₂ produce → ??? mole of P₄.
∴ The no. of moles of phosphorous (P₄) will be produced = (1.0 mole)(0.3224 mole)/(2.0 mole) = 0.1612 mol.
• Describe how ultrasound and infrasound are used in specific industrial applications and provide detailed examples.
Ultrasound is sound or vibrations, having an ultrasonic frequency, particularly as used in medical imaging. Ultrasound is more commonly used in medical terminology than in industry. Infrasound is sound waves with frequencies below the lower limit of human audibility.
1. If we have a reaction of Zn3PO4 and HCl, what would the products of this
reaction be? If we produced 13.05 g of H3PO4, how many grams of
hydrochloric acid would be need to start with?
Answer:
1. The products of this reaction are ZnCl₂ and H₃PO₄.
2. 14.57 g.
Explanation:
1. What would the products of this reaction be?
The balanced reaction between Zn₃(PO₄)₂ and HCl is represented as:Zn₃(PO₄)₂ + 6HCl → 3ZnCl₂ + 2H₃PO₄,
It is clear that 1.0 mol of Zn₃(PO₄)₂ reacts with 6.0 mol of HCl to produce 3.0 mol of ZnCl₂ and 2.0 mol of H₃PO₄.
So, the products of this reaction are ZnCl₂ and H₃PO₄.
2. If we produced 13.05 g of H₃PO₄, how many grams of hydrochloric acid would be need to start with?
Firstly, we should get the no. of moles (n) of 13.05 grams of H₃PO₄:n = mass/molar mass = (13.05 g)/(97.994 g/mol) = 0.1332 mol.
Using cross-multiplication:
6.0 mol of HCl needed to produce → 2.0 mol of H₃PO₄, from stichiometry.
??? mol of HCl needed to produce → 0.1332 mol of H₃PO₄.
∴ The no. of moles of HCl needed = (6.0 mol)(0.1332 mol)/(2.0 mol) = 0.3995 mol.
∴ The mass of HCl needed = n*molar mass = (0.3995 mol)(36.46 g/mol) = 14.57 g.
So, the grams of hydrochloric acid would be need to start with = 14.57 g.
Which substance has a nonpolar covalent bonds?
Cl2
SO3
SiO2
CCl4
Answer:
Substance with a nonpolar covalent bonds is [tex]Cl_2[/tex].
Explanation:
Polar covalent compound: This compound is formed when difference in electronegativity between the atoms is present. When atoms of different elements combine, it results in the formation of polar covalent bond. For Example: [tex]CO_2,NO_2[/tex] etc..
Non-polar covalent compound: This compound is formed when there is no difference in electronegativity between the atoms. When atoms of the same element combine, it results in the formation of non-polar covalent bond. For Example: [tex]N_2,O_2[/tex] etc.
Substance with a nonpolar covalent bonds is [tex]Cl_2[/tex].
Among the options, Cl2 is the only substance that contains nonpolar covalent bonds because the two chlorine atoms share the pair of electrons equally having the same electronegativity.
Explanation:
The substance that contains nonpolar covalent bonds among the listed options is Cl2. Nonpolar covalent bonds occur when two atoms share a pair of electrons equally, usually seen in diatomic elements or compounds with the same elements. In Cl2, two chlorine atoms share the pair of electrons equally since they have the same electronegativity, hence, it forms a nonpolar covalent bond.
On the other hand, SO3, SiO2, and CCl4 contain polar covalent bonds because the bonding electrons are not shared equally due to a difference in electronegativity of the atoms involved.
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What is the empirical formula for sulfur dioxide?
Answer:Sulfur dioxide
CID: 1119
Molecular Formula: SO2 or O2S
UNII:0UZA3422Q4
Chemical Names: sulfur dioxide sulphur dioxide Sulfurous anhydride 7446-09-5 Sulfurous oxide More...
Molecular Weight: 64.058 g/mol
Explanation: can i have brailyest plz
Answer:
SO2
Explanation:
which mineral group dose copper belong
Answer:
Native Elements; Metallic Elements
Explanation:
Consider the following reaction at equilibrium
PCl3 (g) + Cl2 (g) ↔ PCl5 (g) ∆H = –86 kJ/mol
What type of reaction is this?
Please helppp me!
How will the equilibrium be affected by adding more of the product?
Is the reaction endothermic or exothermic? How will the equilibrium be affected by adding heat?
How will the equilibrium be affected by increasing the pressure on the closed system?
Explain the principle that you used in determining how the equilibrium is affected.
Answer:
1. Equilibrium shifts to (lift side) produce more reactant.
2. Exothermic reaction, Equilibrium shifts to (lift side) produce more reactant.
3. Increasing the pressure will shift the reaction to the side with lower moles of gas (right side).
4. Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.
Explanation:
Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.1. How will the equilibrium be affected by adding more of the product?
When more product is added:This will increase the concentration of the products side, so the reaction will be shifted to the lift side (reactants side) to suppress the increase in the concentration of Products.
So, the right choice is: Equilibrium shifts to produce more reactant.
2. Is the reaction endothermic or exothermic? How will the equilibrium be affected by adding heat?
Since the sign of ΔH is negative, the reaction is exothermic reaction.
The reaction can be represented as:
PCl₃ (g) + Cl₂ (g) ↔ PCl₅ (g) + heat.
Adding heat:
Adding heat is like adding more product to the reaction, so the reaction will be shifted to the lift side (reactants side) to suppress the effect of adding heat.
So, the right choice is: Equilibrium shifts to the lift side (produce more reactant).
3. How will the equilibrium be affected by increasing the pressure on the closed system?
Increasing the pressure:When there is an increase in pressure, the equilibrium will shift towards the side with fewer moles of gas of the reaction. And when there is a decrease in pressure, the equilibrium will shift towards the side with more moles of gas of the reaction.
The reactants side (left) has 2.0 moles of gases and the products side (right) has 1.0 mole of gases.So, increasing the pressure will shift the reaction to the side with lower moles of gas (right side).
4. Explain the principle that you used in determining how the equilibrium is affected.
Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.Spontaneous decay of certain elements in nature occurs because these elements have
A. disproportionate ratios of electrons to protons
B. disproportionate ratios of neutrons to protons
C. low reactivity with oxygen
D. high reactivity with oxygen
Please Answer ASAP!!
Answer:
B.
Explanation:
The neutron/proton ratio for a certain element must fall within a certain range for the element to be stable. That’s why some isotopes of an element are stable and others are radioactive.
Spontaneous decay of certain elements in nature occurs because these elements have disproportionate ratios of neutrons to protons. Thus, option B is correct.
What is radioactive decay?Radio active decay is a process in which unstable nuclei will convert into stable nuclei by the emission of some particles in the form of radiations.
Unstable nature of nuclei is due to the presence of inappropriate ratio of neutrons to protons inside the nucleus. So these type of molecules shows spontaneous decay to attain stability.
Hence, the reason is the disproportionate ratios of neutrons to protons. Thus, option B is correct.
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