Physics Physics Nuclear Physics

Question 1

What particles make up the atomic nucleus?

Accepted Answer

Protons and neutrons

Answer

Electrons and protons

Answer

Electrons and neutrons

Answer

Quarks and leptons only

Question 2

The atomic number of an element equals the number of:

Accepted Answer

Protons in the nucleus

Answer

Neutrons in the nucleus

Answer

Total nucleons

Answer

Electrons in the outer shell

Question 3

Isotopes of an element have the same number of protons but different numbers of:

Accepted Answer

Neutrons

Answer

Electrons

Answer

Protons

Answer

Energy levels

Question 4

What force holds protons and neutrons together in the nucleus?

Accepted Answer

Strong nuclear force

Answer

Electromagnetic force

Answer

Gravitational force

Answer

Weak nuclear force

Question 5

The mass number of an atom equals:

Accepted Answer

Number of protons plus neutrons

Answer

Number of protons minus neutrons

Answer

Number of electrons plus protons

Answer

Atomic weight in grams per mole

Question 6

What is nuclear binding energy?

Accepted Answer

Energy needed to completely separate all nucleons in a nucleus

Answer

Energy released when an electron is added to an atom

Answer

Energy required to ionize an atom completely

Answer

Energy stored in covalent chemical bonds