Which quantity can vary among atoms of the same element?A) mass number
B) atomic number
C) number of protons
D) number of electrons

Answers

Answer 1

Answer: there is this thing called isotopes
it means that atoms of the same element can have a different number of neutrons.
if there is a change in the no. of neutrons, there will definitely be a change in the mass number.

so the answer is A) mass number

Answer 2

Answer:

Final answer:

The quantity that can vary among atoms of the same element is the mass number, which represents the sum of the number of protons and neutrons in an atom.

Explanation:

The quantity that can vary among atoms of the same element is the mass number. The mass number represents the sum of the number of protons and neutrons in an atom. While the atomic number (which represents the number of protons) remains constant for atoms of the same element, the number of neutrons can vary, resulting in different mass numbers for atoms of the same element.

Learn more about atom here:

brainly.com/question/30735712

#SPJ6

Related Questions

What is ductiliy in a solid
What did researchers at Virginia Tech try using to help reforest post-mining site soil?
potassium atom (atomic number 19) and a bromine atom (atomic number 35) can form a chemical bond through a transfer of one electron. The potassium ion that forms has 18 electrons. What best describes the bromide ion that forms? It is a negative ion that has one less valence electron than a neutral bromine atom. It is a positive ion that has one less valence electron than a neutral bromine atom. It is a negative ion that has one more valence electron than a neutral bromine atom. It is a positive ion that has one more valence electron than a neutral bromine atom.
A 134.0 g sample of an unknown metal is heated to 91.0⁰C and then placed in 125 g (125 mL) of water at 25.0⁰C. The final temperature of the water is measured at 31.0⁰C. Calculate the specific heat capacity of the unknown metal.
The action force always acts in the ____ direction as the reaction force

What happend if NH3+ HJ

Answers

Are you sure you copied that down correctly? I know what NH3 is but HJ I am comming up blank on. The only thing HJ I know is hebdojoule which is unit system.
Are you doing chemical balancing?

What is the change in heat energy when 132g of copper at 32.2°C is raised to 45.0oC? The specific heat of copper is 0.385 J/g °C.

Answers

Heat energy can be calculated by using the specific heat of a substance multiplying it to the mass of the sample and the change in temperature. It is expressed as:

Energy = mCΔT
Energy = 132 (0.385) (45 - 32.2)
Energy = 650.50 J

According to the kinetic molecular theory, which statement describes an ideal gas?(1) The gas particles are diatomic
(2) Energy is created when the gas particles collide
(3) There are no attractive forces between the gas particles
(4) The distance between the gas particles is small, compared to their size.

Answers

The correct answer is option 3. There are no attractive forces between the gas particles in an ideal gas. For an ideal gas to be achieved, the molecules are far from each other as possible where no attraction or collisions happen with each molecule.

The ph of a 0.001 m hcl solution is closest to

a. 1
b. 7
c. 3
d. 10

Answers

C 3 is the answer because its right

Consider the following reaction to generate hydrogen gas: Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g) The hydrogen gas is collected by displacement of water at 35.0 °C at a total pressure of 745 torr. The vapor pressure of water at 35.0 °C is 42 torr. Calculate the partial pressure of H2 (in atm) if 353.2 mL of gas is collected over water from this method.

Answers

Answer:

0.925 atm

Explanation:

By Dalton's Law, the total pressure of a gas mixture is the sum of the partial pressure of its components. The vapor pressure of the water is the pressure that some molecules that evaporated do under the liquid surface. The gas and the liquid are at equilibrium. So, the gas mixture is water vapor and hydrogen gas.

Ptotal = Pwater + PH₂

745 = 42 + PH₂

PH₂ = 703 torr

Transforming to atm:

1 atm ------------------760 torr

x ------------------ 703 torr

By a simple direct three rule

760x = 703

x = 0.925 atm

For the water molecule, oxygen is _______ electronegative than hydrogen. The difference in electronegativity signifies that the hydrogen-oxygen bond is _______. According to the electronegativity difference between the atoms in water, it would be appropriate to label hydrogen with the symbol, _______, and oxygen with the symbol, _______. Based on the electronegativity difference between carbon and oxygen, the bonds in carbon dioxide are _______.
According to the electronegativity difference between the atoms in carbon dioxide, it would be appropriate to label oxygen with the symbol, _______, and carbon with the symbol, _______.
Based on the electronegativity difference between carbon and hydrogen, the bonds in methane are _______.
According to the electronegativity difference between the atoms in methane, it would be appropriate to label hydrogen with the symbol, _______, and carbon with the symbol, _______.

Answers

In water molecule, oxygen is more electronegative than hydrogen.

The difference in electronegativity signifies that the hydrogen-oxygen bond is polar in nature i.e. partial positive and partial negative.

According to the electronegativity difference between the atoms in water, it would be appropriate to label hydrogen with the symbol partial positive(Hδ+) and oxygen with the symbol partial negative(Oδ-.) due to attraction of electron pair.

Based on the electronegativity difference between carbon and oxygen, the bonds in carbon dioxide are polar in nature means they making poles.

According to the electronegativity difference between the atoms in carbon dioxide, it would be appropriate to label oxygen with the symbol partial negative(Oδ-) and carbon with the symbol partial positive(Cδ+).

Based on the electronegativity difference between carbon and hydrogen, the bonds in methane are polar because of different values of electronegativity.

According to the electronegativity difference between the atoms in methane, it would be appropriate to label hydrogen with the symbol partial positive(Hδ+) and carbon with the symbol partial negative(Cδ-.).

Learn more: brainly.com/question/11630877

polar

plus delta

negative delta

polar

negative delta

positive delta

polar

positive delta

negative delta

negative delta are the more electronegative molecules

positive delta are the least electronegative molecules