Radiactivity

Horizontal Words

1. Units of radioactivity (9)
3. he time taken for half the radioactive nuclei in a sample to decay (9)
5. The process by which unstable atomic nuclei emit particles or EM radiation (13)

Vertical Words

2. The type of radiation made up of electrons (4)
4. The smallest particle of an element that retains its chemical properties (4)
6. The type of radiation that is a high-energy electromagnetic wave (5)
7. The central part of an atom that contains protons and neutrons (7)