PERIODE 3 CROSSWORD

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Across
  1. 1. In the third period of the periodic system from Na to Ar, the atom of the first element has an outer electron
  2. 4. sodium to magnesium to aluminum causes atoms to be
  3. 6. one of the period 3 elements of the S-block member
  4. 7. chlorine appears between fluorine and
  5. 8. a liquid metal that does not have a solid metallic luster at temperature and pressure
  6. 10. atomic number of sodium
  7. 11. all period 3 elements have at least how many stable isotopes
  8. 12. Argon is the third-most .... gas in earth's atmosphere
  9. 14. symbol of silicon
Down
  1. 2. the chemical element with the symbol S and atomic number 16
  2. 3. The strongest oxidizing property in the third period is owned by
  3. 4. which is a soft, silvery white and highly reactive metal
  4. 5. phosporus available as a
  5. 9. yellow-green gas at room temperature
  6. 13. Period 3 elements are in the...rows of the periodic table