Physical Science Chapter 4 and 5

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Across
  1. 5. the SI base unit used to measure the amount of a substance
  2. 6. Is CO a mixture or compound
  3. 9. A subatomic particle that has no charge and that is found in the nucleus of an atom
Down
  1. 1. A horizontal row of elements in the periodic table
  2. 2. A subatomic particle that has a positive charge and that is found in the nucleus of an atom
  3. 3. A subatomic particle that has a negative charge
  4. 4. An atom or group of atoms that has lost or gained one or more electrons and has a negative or positive charge
  5. 7. Is air a mixture or compound
  6. 8. A vertical column of elements in the periodic table
  7. 10. An atom's central region which is made up of protons and neutrons