Across
- 4. A positively charged particle, found in the nucleus,and weighs exactly 1 AMU
- 6. The nuclei of 2 atoms combine, forming an atom with a heavier nucleus
- 10. Holds all of the Protons and neutron
- 12. Atoms of the same element that have different number of neutrons
- 13. The Ability of an atom to emit mass and energy
- 14. The time taken for the radioactive isotope to fall to half its original value
Down
- 1. A series of events, each caused by the previous one
- 2. Weakest form of decay and least dangerous
- 3. The number of protons in the nucleus of an atom, determines its place in the periodic table
- 5. Has a neutral charge, found in the nucleus, and weighs exactly 1 AMU
- 7. A neutron turns into a proton and a electron is emitted
- 8. The total number of protons and neutrons in a nucleus
- 9. Most dangerous, no changed particles release only high energy gamma rays
- 11. The radioactive nucleus of a large atom is split into 2 or more smaller ones,also releases 2 or 3 neutrons