Across
- 3. notation of one or two letters representing one or two elements.
- 5. natural materials that do not produce heat or electricity
- 8. natural materials that have high electrical conductivity.
- 10. neutral charged subatomic particle.
- 11. emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
- 14. positively charged subatomic particle.
- 15. horizontal rows of the periodic table.
Down
- 1. describes the number of protons in the nucleus of an atom.
- 2. negatively charged subatomic particles.
- 4. electrons found in the outermost shell.
- 6. central and most important part of an object.
- 7. relative capacity of an atom, molecule, or radical that undergoes a chemical reaction with another atom
- 9. basic unit of a chemical element.
- 12. two or more types of atoms that have the same number of protons but different numbers of neutrons
- 13. a column in the periodic table of the chemical elements.