Across
- 2. / The part of the atom where the protons and neutrons are found.
- 3. / An alpha particle has the same nucleus as this element.
- 6. / The time taken for half of the radioactive nuclei now present to decay.
- 7. / The rate of decay or counts per minute.
- 8. / The type of ionising radiation that is an electromagnetic wave.
- 11. / When enough energy is transferred to break an atom or molecule into parts, called ions.
Down
- 1. / The measure of radioactivity.
- 4. / A type of ionising radiation which is slow and heavy.
- 5. / How far the ionising radiation will travel into different materials.
- 9. / A type of ionising radiation that is identical to an electron.
- 10. / Atoms with the same number of protons but different numbers of neutrons.