Unit 5 Vocab

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Across
  1. 2. positively charged atom
  2. 3. vertical on the periodic table
  3. 5. organizes elements by atomic number
  4. 8. positive electric charge
  5. 9. negatively charged atom
  6. 13. 1 or 2 letter designation of an atom
  7. 14. group 18 of the periodic table
  8. 17. number of protons and neutrons in the nucleus
  9. 18. horizontal on the periodic table
  10. 19. neutral electric charge
  11. 20. negative electric charge
Down
  1. 1. the dots represent the valence electrons of the atom
  2. 4. an atom or a molecule that has a positive or negative electrical charge
  3. 6. number of protons in the nucleus
  4. 7. a group of atoms with charge
  5. 10. have 8 valence electrons
  6. 11. electrons in the outermost shell of an atom
  7. 12. a small nucleus (positively charged) surrounded by negative electrons moving around the nucleus in orbits
  8. 15. how easily a substance reacts chemically with other substances
  9. 16. atoms with thesame number of protons and electrons, but a different number of neutrons