Atoms Elements

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Across
  1. 2. Vertical column in the periodic table
  2. 5. Greek philosopher who proposed the idea of atoms
  3. 8. Important for strong bones and teeth
  4. 9. The lightest and first element in the periodic table
  5. 11. Substance made of only one type of atom
  6. 12. Smallest unit of matter
  7. 13. Horizontal row in the periodic table
Down
  1. 1. Found in all living things
  2. 3. Essential for respiration
  3. 4. A noble gas with two protons
  4. 6. A highly reactive metal in Group 1
  5. 7. Positively charged particle
  6. 10. table Organizes elements by their properties