Across
- 3. Can go through skin and aluminium but is stopped by lead
- 5. Calculated by adding neutrons and protons
- 6. When an atom has a different mass than whats on the periodic table
- 8. Instability in a atom which makes it this
- 10. 2 atom combine and release energy
- 12. When something happens and causes another set of reactions to happen
- 13. This determines its place on the periodic table, Calculated by the number of protons
- 14. The Time point when a sample has gotten to half of its original amount
Down
- 1. An atom splits and releases energy
- 2. Is released during beta decay, Is one electron
- 4. Releases during Alpha decay, Also known as a helium nucleus
- 7. Determines what element it is
- 9. the center of a atom and contains most mass in a atom
- 11. Neutrally charged subatomic particle, Weighs 1 amu