Matter Unit

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Across
  1. 3. shorthand way of representing an element
  2. 5. the average mass of the element
  3. 7. has a positive charge
  4. 8. has a negative charge
  5. 9. the tiny central core of an atom
Down
  1. 1. formed by 2 or more atoms bonded together
  2. 2. has a neutral charge
  3. 4. Anything that has mass a takes up space
  4. 5. the number of protons in it's nucleus
  5. 6. The smallest particle of an element