The Elements

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Across
  1. 2. – Essential for DNA, atomic number 15
  2. 6. – Noble gas with full outer shell
  3. 8. – Has 3 valence electrons, used in glassmaking
  4. 9. – 2 valence electrons, burns with a bright white light
  5. 10. – Electronic configuration 2,8,4, used in semiconductors
  6. 11. – Valency of 2, atomic number 4
  7. 12. – Has a full outer shell with just two electrons
  8. 13. – Forms four bonds, found in all living things
  9. 15. – Atomic number 11, reacts explosively with water
  10. 16. – Has 2 valence electrons, strengthens bones
  11. 17. – 2- charge in compounds, essential for respiration
Down
  1. 1. – Atomic number 7, makes up 78% of air
  2. 3. – Atomic number 1, has one proton
  3. 4. – The most electronegative element, atomic number 9
  4. 5. – Atomic number 19, essential for nerve function
  5. 6. – Atomic number 13, used in lightweight metals
  6. 7. – Atomic number 3, has one valence electron
  7. 10. – Can form -2 charge, has a pungent smell
  8. 13. – Atomic number 17, disinfects swimming pools
  9. 14. – Electronic configuration 2,8, used in bright signs