periodic table terms

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Across
  1. 2. physical and chemical properties change
  2. 3. elements that are in the same column
  3. 5. particles that are in clouds around the nucleus
  4. 9. ionic metals and non metals
  5. 11. gases with full outer energy level of electrons
  6. 12. smallest unit of life
  7. 14. protons and neutrons equals mass and number
  8. 16. metals give their electrons to the non metals
Down
  1. 1. electrons are shared between the elements
  2. 4. covalent nonmetals nonmetals
  3. 6. result of a chemical bond
  4. 7. all atoms want this to be considered happy
  5. 8. number of protons equals electrons
  6. 10. major group of elements will lose electrons
  7. 13. atoms want a full outer energy level
  8. 15. atomic number equals protons or electrons