Periodic table

4. The number of protons that aluminium (Al) has.
7. As ions, metals have _____ electrons than protons.
8. This element in period 1 typically has no neutrons.
11. The type of charge that this element in Group 2, Period 4 has as an ion.
13. This is the second last element in Group 2.
14. This is the second last element in Period 2.
15. This Group 1 element has four neutrons.
16. This is the atomic mass of the last element in Period 2.
18. Name of the element in Group 1, Period 3.

1. This is the number of neutrons that the second element in Period 3 has.
2. The type of molecule that the second last Group of elements in the periodic table exist as naturally.
3. All elements in Group 1 react with this substance strongly.
5. The number of electrons that the negative ions in Period 3 always have.
6. This element in period 3 forms a negative ion with a 3- charge.
9. The type of charge that nonmetals have.
10. The number of protons that this element in Group 1, Period 4 has.
12. The number of electrons that a neutral atom of oxygen has.
17. As a neutral atom, the number of protons that an element has _____ the number of electrons.