Periodic table

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123456789101112131415161718
Across
  1. 5. This element in period 3 forms a negative ion with a 3- charge.
  2. 6. The number of protons that this element in Group 1, Period 4 has.
  3. 8. This element in period 1 typically has no neutrons.
  4. 12. Name of the element in Group 1, Period 3.
  5. 15. The number of protons that aluminium (Al) has.
  6. 16. This is the number of neutrons that the second element in Period 3 has.
  7. 18. This is the second last element in Group 2.
Down
  1. 1. This is the second last element in Period 2.
  2. 2. The number of electrons that the negative ions in Period 3 always have.
  3. 3. As ions, metals have _____ electrons than protons.
  4. 4. The type of charge that this element in Group 2, Period 4 has as an ion.
  5. 7. The type of charge that nonmetals have.
  6. 9. The type of molecule that the second last Group of elements in the periodic table exist as naturally.
  7. 10. This Group 1 element has four neutrons.
  8. 11. This is the atomic mass of the last element in Period 2.
  9. 13. All elements in Group 1 react with this substance strongly.
  10. 14. As a neutral atom, the number of protons that an element has _____ the number of electrons.
  11. 17. The number of electrons that a neutral atom of oxygen has.