WJEC GCSE Physics radioactivity and nuclear energy overview quiz quiz

Electrons only

A small positive nucleus of protons and neutrons

A negative nucleus

Empty space only

A fast electron

A helium nucleus (2 protons and 2 neutrons)

An electromagnetic wave

A proton

Gamma

Beta

Alpha

X-rays

Alpha

Beta

Gamma

They are all equal

A helium nucleus

A fast electron emitted from the nucleus

A high-energy electromagnetic wave

A neutron

Radiation from nuclear power stations only

Low-level radiation always present, mostly from natural sources

Radiation from mobile phones

Radiation that does not exist

It is the most penetrating

It is the most strongly ionising and deposits its energy in nearby cells

It is an electromagnetic wave

It has no charge

The time for all nuclei to decay

The average time for half the unstable nuclei (or the activity) to decay

Half the age of the sample

The time for the source to disappear

400 Bq

200 Bq

100 Bq

0 Bq

The detector is broken

Decay is a random process

The half-life keeps changing

Background radiation is increasing

Joining two small nuclei together

Splitting a large unstable nucleus, releasing energy and neutrons

An electron leaving an atom

A gamma ray being absorbed

The gamma rays released

The neutrons released going on to split more nuclei

The heat produced

The electrons released

To speed up the neutrons

To absorb surplus neutrons and keep the reaction steady

To produce more uranium

To cool the water

Splitting a large nucleus

Joining two small nuclei to form a heavier nucleus, releasing energy

An atom losing an electron

A nucleus emitting an alpha particle