Room 2 Ayia , Katherine and Jordana

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Across
  1. 4. its chemical symbol is Ca
  2. 6. the atomic number is 2
  3. 7. it is the lightest element in the periodic table
  4. 8. it is the eight on the periodic table of elements
  5. 10. its chemical symbol is Na
Down
  1. 1. its atomic number is 90
  2. 2. its chemical symbol is Si
  3. 3. its chemical symbol is Li
  4. 5. its atomic number is 12
  5. 9. it has a balanced number of electrons and protons