Nuclear Radiation

2. A nuclear reaction process that converts one type of atom to a different type of atom
5. A small negatively charged particle
8. A process that causes a nucleus to change
9. A small negatively charged particle ejected from the nucleus during Beta decay
10. Having no overall charge
12. A particle with no electric charge found in the nucleus
14. A positively charged particle in the nucleus
15. Atoms that have the same number of protons but a different number of neutrons

1. The number of protons and neutrons in an atom
3. The number of protons in a nucleus
4. The time it takes for half the nuclei to decay
6. A substance made of only one type of atom
7. A form of ionising radiation ejected from the nucleus during Gamma decay
11. A particle made of two protons and two neutrons ejected from the nucleus during Alpha decay
13. The building block of all matter