Periodic Table By Nahla Heidt 09/01/22 Group Blue

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Across
  1. 3. He
  2. 6. Number 27 in the periodic table
  3. 8. Atomic mass of 20.180
  4. 11. Number of protons and neutrons in element
  5. 13. Negative charge
  6. 14. Ti
  7. 16. Atomic mass of 87.62
  8. 18. Au
  9. 19. Neutral charge
Down
  1. 1. Positive charge
  2. 2. Number of electrons not in a complete shell
  3. 4. Discovered by Marie Curie
  4. 5. Atomic mass of 44.956
  5. 7. The rows in the periodic table
  6. 9. Atomic mass of 84.80
  7. 10. The total wight of an element
  8. 12. Atomic number=protons=electrons
  9. 15. The columns in the periodic table
  10. 16. Na
  11. 17. Mass number-Atomic number=Neutrons