Chemistry - C4

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Across
  1. 2. can be either positive, negative or no ______ for an atom
  2. 5. bond between a metal and non metal
  3. 6. number of protons + neutrons in nucleus
  4. 7. number of protons
  5. 10. sub atomic particle with a positive charge
  6. 11. if a halogen added to a solution of a compound containing a less reactive halogen, it will react with the compound and form a new one
Down
  1. 1. sub atomic particle with a negative charge
  2. 3. have high melting points, conducts electricity in a solution but does not when solid
  3. 4. group 7 elements
  4. 8. copy of a certain atom, but has the same number of protons but different number of neutrons
  5. 9. sub atomic particle with no charge (neutral)