Nuclear Physics Multiple Choice Questions

An unknown chemical element is presented by the following formula shown on the left. What is the name of index Z?

• Atomic mass number

• Atomic number

• Principle quantum number

• Orbital quantum number

An unknown chemical element is presented by the following formula shown on the left. What is the name of index A?

• Atomic mass number

• Atomic number

• Principle quantum number

• Orbital quantum number

The atomic number is equivalent to which of the following?

• The number of neutrons in the atom.

• The number of protons in the atom.

• The number of nucleons in the atom.

• The number of 𝛼–particles in the atom.

The atomic mass number is equivalent to which of the following?

• The number of neutrons in the atom.

• The number of protons in the atom.

• The number of nucleons in the atom.

• The number of 𝛼–particles in the atom.

Which of the following particles has the smallest mass?

• Proton

• Electron

• Neutron

• Nucleon

Which of the following statements about the mass of an atom is true?

• It is evenly divided between the protons and the orbiting electrons.

• It is evenly divided between the nucleons and the orbiting electrons.

• It is concentrated in the nucleus.

• It is evenly divided between protons, neutrons and orbiting electrons.

Which of the following is correct for the number of neutrons in the nucleus?

• N=A–Z

• N=Z+A

• N=Z

• N=A

How many electrons are in the atom shown to the left?

• 12

• 6

• 18

• 3

How many nucleons are in the atom shown to the left?

• 30

• 18

• 10

• 20

How many neutrons are in the atom shown to the left?

• 12

• 11

• 18

• 23