Periodic Table

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Across
  1. 2. an element in period 5 with an atomic number 47
  2. 5. this element is in period 4 with 3 valance electrons
  3. 8. an element family that belongs to poor conductors with vigilant reactions
  4. 9. the element family that are shiny and good conductors
  5. 10. the element that makes up most of the universe
  6. 12. an element in group 15 and period 6
  7. 16. the element family that is semi-soft and reactive
  8. 17. an element that is commonly used in jewelry and has an atomic mass of 196.967
  9. 18. the element that humans breathe in
Down
  1. 1. the noble gas that makes balloons rise
  2. 3. this element is found in the actinide series and was named after a state
  3. 4. the element family that is soft, silvery, and very reactive
  4. 6. an element family that never reacts with other gases
  5. 7. the symbol of the element used to make brightly colored signs
  6. 8. this chemical combination makes water
  7. 11. this element has the highest melting point of any metal
  8. 12. a brittle, dark element with the atomic mass of 10.812
  9. 13. this element is used in thermometers
  10. 14. what is the symbol for chromium
  11. 15. what diamonds are entirely made out of