Across
- 2. Helium nucleus
- 6. Atoms in which mass is different than listed on periodic table
- 7. Radiation that is waves instead of particles
- 9. Amount of protons
- 10. Radioactive nucleus is split
- 11. The amount of time it takes for a sample to lose half of its mass
- 12. Protons + neutrons
Down
- 1. Ability of an atom to emit mass & energy
- 3. Housed in the nucleus; positive charge
- 4. Housed in the nucleus; neutral charge
- 5. Reaction in which an atom spreads the reaction to others
- 8. Nuclei of two atoms combine
- 10. The center of a atom
- 13. Particle that has a negative charge