Puzzle 1: Periodic Table Elements

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Across
  1. 2. – Metal in table salt (NaCl)
  2. 3. – Metal in rechargeable batteries
  3. 6. – Valuable yellow metal, chemical symbol Au
  4. 7. – Metal used in electrical wiring
  5. 8. – Precious metal used in jewelry and coins
  6. 10. – Essential gas for respiration
Down
  1. 1. – Noble gas used in balloons
  2. 4. – Common metal, key for hemoglobin
  3. 5. – Lightest element, atomic number 1
  4. 7. – Element basis of all life
  5. 9. – Burns with a bright white flame
  6. 11. – Gas used in bright advertising signs