Atomic Structure

• 
  A neutron carries a positive charge.

• True

• False

Answer explanation

Neutrons are neutral particles, meaning they do not carry a positive charge. Therefore, the statement that a neutron carries a positive charge is false.

How many atoms of nitrogen are in the formula NH₄OH?

• One

• Two

Answer explanation

The formula NH4OH contains one atom of nitrogen, as there is only one nitrogen atom in the compound.

• 
  How many atoms of oxygen are in Sn(SO₄)₂?

• 4

• 5

• 8

• 2

Answer explanation

To find the number of oxygen atoms in Sn(SO4)2, we multiply the subscript of oxygen (4) by the coefficient of the sulfate ion (2), giving us 8 oxygen atoms.

• 
  Identify the atomic number of the element of Xenon.

• 54

• 45

• 5

• 4

Answer explanation

The atomic number of Xenon is 54, which corresponds to the correct answer choice.

The atomic number of an atom is determined by the number of

• Proton

• Electrons

• Neutrons

Answer explanation

The atomic number of an atom is determined by the number of protons, making the correct choice Proton.

• 
  A proton has a charge that is equal in force but opposite in charge of each electron

• True

• False

• Cant Determine

Answer explanation

Answer Explanation highlighting the correct choice: Proton has opposite charge to electron.

Protons and electrons are about equal in mass.

• True

• False

Answer explanation

Protons are much more massive than electrons, with protons having a mass approximately 1836 times greater than electrons. Therefore, the statement that protons and electrons are about equal in mass is false.

• 
  The mass of an atom depends on the number of protons and neutrons in its nucleus.

• True

• False

Answer explanation

The statement is true because the mass of an atom is determined by the sum of the protons and neutrons in its nucleus.

• 
  How do you determine the mass number of an atom?

• It is equal to the number of protons

• It is equal to the number of protons plus the number of electrons

• 
  It is equal to the number of protons plus the number of neutrons

• It is equal to the number of electrons plus the number of neutrons

Answer explanation

The mass number of an atom is equal to the number of protons plus the number of neutrons, as neutrons contribute to the mass of the atom.

Atoms of the same element with different numbers of neutrons are called__________.

• 
  Isotopes

• 
  Ions

Answer explanation

Atoms of the same element with different numbers of neutrons are called isotopes.