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