Building blocks of matter

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Across
  1. 2. Ag
  2. 5. The energy produced during respiration
  3. 8. Sodium chloride
  4. 9. Au
  5. 10. When two or more atoms are joined together
  6. 13. When a molecule forms or combines chemically
  7. 16. This table is an arrangement of the elements based on shared characteristics
  8. 17. Iron oxide
  9. 18. Positive charged particle
  10. 19. This number also refers to how many protons an element has
  11. 20. Vertical columns of the periodic table
Down
  1. 1. Horizontal rows of the periodic table
  2. 3. Neutral of no charge
  3. 4. Co
  4. 6. The smallest particle with lots of energy
  5. 7. Negative charged particle
  6. 11. The type of acid that has carbon, hydrogen and oxygen atoms
  7. 12. A pure substance made up of one type of atom
  8. 14. The atomic_ is the weight of one atom of that element and is shown at the bottom of the element block.
  9. 15. Cu