Chemistry vocab

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Across
  1. 2. formed when an atom loses electrons
  2. 4. word used to describe the outermost electron shell
  3. 5. type of ion that has more than one element in it
  4. 8. positively charged particle in the nucleus
  5. 10. indicates the number of protons in the nucleus
  6. 12. metals found in centre of periodic table
  7. 15. consists of two or more atoms
  8. 17. consists of only one type of atom
  9. 18. group that makes 1- ions
Down
  1. 1. formed when an atom gains electrons
  2. 2. compounds in which atoms share electrons
  3. 3. consists of two or more elements
  4. 6. group that makes 1+ ions
  5. 7. negative particle that orbits the nucleus
  6. 9. compounds that have a bond between metals and non-metals
  7. 11. indicates the number of nucleons in the nucleus
  8. 13. uncharged particle found in the nucleus
  9. 14. elements with a full valence shell
  10. 16. building blocks of all matter