Year 11 Physics Nuclear Model and Stability

What is a nucleon?

• A Proton

• A Neutron

• A proton or a neutron

• A Electron

In the middle of an atom is the nucleus which contains _______ and neutrons.

Electrons orbit around
the nucleus in what is known as the electron _____.

What is the atomic number?

• The number of neutrons.

• The number of protons.

• The number of electrons.

• The total number of neutrons and protons.

What is the atomic mass number?

• The number of nucleons.

• The number of electrons.

• The total number of subatomic particles.

• The number of protons.

An isotope is an atom with the same number of protons (therefore being the same element), but
with a varying number of ________ (therefore different mass).

An element which does not have a neutral charge. It either has an excess of _________ or protons.

What is relative atomic mass/atomic weight?

• The average mass of the protons of an element found in nature.

• The average number of neutrons an element has.

• The average number of electrons an element has.

• The average mass of
  the atoms of an element as it is found in nature.

An isotope is a form of an element with the same number of protons but different number of _______.

What stops the nucleus of an atom from flying apart?

• Weak nuclear forces.

• Strong nuclear forces.

• Weak and strong nuclear forces.

• The electrostatic force between subatomic particles.