Chemistry

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Across
  1. 4. the number of protons in the nucleus of an atom
  2. 7. what you end up with in an equation;after the arrow
  3. 9. the least reactive family
  4. 10. a group of elements with similar chemical properties
Down
  1. 1. the most reactive family
  2. 2. the number of protons and neutrons added together
  3. 3. rows of the periodic table
  4. 5. what you start within an equation;before the arrow
  5. 6. An abbreviation for a chemical element
  6. 8. how likely an element is to go through a chemical change