Radiation - Knowledge quiz

What is ionisation?

• When an atom splits in half.

• When an atom releases a neutron.

• The gain or loss of an electron from an atom.

• The atom releases heat.

The unit of Activity is the

• Gray

• Becquerel

• Sievert

• Hertz

The unit of absorbed dose is

• Gray

• Becquerel

• Sievert

• Hertz

The unit of equivalent dose is

• Gray

• Becquerel

• Sievert

• Hertz

An alpha particle is

• 2 protons and 2 neutrons.

• a fast moving electron.

• an electromagnetic wave.

• the number of decays per second.

A beta particle is

• 2 protons and 2 neutrons.

• a fast moving electron.

• an electromagnetic wave.

• the number of decays per second.

Gamma radiation is

• 2 protons and 2 neutrons.

• a fast moving electron.

• an electromagnetic wave.

• the number of decays per second.

A neutral atom ionised by an alpha particle will

• become positive

• become negative

• remain neutral

• emit neutrons and energy

A neutral atom ionised by a beta particle will

• become positive

• become negative

• remain neutral

• emit neutrons and energy

The relative charge of an alpha particle is

• • +1

• 0

• -1

• +2