Unit Vocabulary

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Across
  1. 3. More protons than electrons
  2. 4. Number of protons and neutrons
  3. 6. A chemical symbol, valence electrons are represented by dots
  4. 10. The outermost electron in an atom
  5. 11. Out of PNE, this atom has a positive charge
  6. 13. Equal number of protons and electrons
Down
  1. 1. Out of PNE, this atom has a negative charge
  2. 2. Has 2 forms of the same element with same number of protons and different number of neutrons
  3. 5. Number of protons
  4. 7. The rule that an atom is most stable when it has 8 valence electrons
  5. 8. More electrons than protons
  6. 9. The lowest energy state of an atom
  7. 12. Out of PNE, this atom has no mass
  8. 13. Located at the center of an atom