Chemistry Crossword

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Across
  1. 3. Substance made up of one type of atom and cannot be broken down
  2. 6. Anything that has mass and occupies space
  3. 7. Fundamental principle that energy cannot be created or destroyed
  4. 10. A pure substance formed when at least one metal and one non-metal combines
  5. 11. An atom or a group of atoms that has become electrically charges because it has lost or gained electrons
  6. 12. The number of protons an atom has
  7. 13. Made up of two or more substances combined together
  8. 14. Made up of one type of matter and has a unique set of characteristics
Down
  1. 1. When a material changes state (appearance) but does not change composition (make-up)
  2. 2. The average mass of an element in atomic mass units (amu)
  3. 4. A chemical change which absorbs heat energy
  4. 5. A chemical change which releases heat energy
  5. 8. When two or more substances react to form a new substance
  6. 9. A compound formed when two non-metals combines