Periodic table

2. As a neutral atom, the number of protons that an element has _____ the number of electrons.
4. This Group 1 element has four neutrons.
6. Name of the element in Group 1, Period 3.
8. This is the number of neutrons that the second element in Period 3 has.
10. The type of charge that nonmetals have.
13. This is the atomic mass of the last element in Period 2.
15. The type of charge that this element in Group 2, Period 4 has as an ion.
16. This is the second last element in Period 2.
17. As ions, metals have _____ electrons than protons.

1. This is the second last element in Group 2.
3. This element in period 1 typically has no neutrons.
5. The number of protons that aluminium (Al) has.
7. The type of molecule that the second last Group of elements in the periodic table exist as naturally.
9. The number of protons that this element in Group 1, Period 4 has.
11. All elements in Group 1 react with this substance strongly.
12. The number of electrons that the negative ions in Period 3 always have.
14. The number of electrons that a neutral atom of oxygen has.
15. This element in period 3 forms a negative ion with a 3- charge.