Across
- 4. what does an atom make
- 5. the number of protons plus neutrons
- 8. this has no charge
- 11. it is made up of diffrent elements
Down
- 1. the very small and dense part of an atom
- 2. the number of protons which equals the number of electrons
- 3. this is the smallest part of an element
- 6. all the elements in each collum in the periodic table
- 7. is a posotive charge
- 9. this is an atom that has the same number of protons but diffrent number of neutrons
- 10. the rows that go across in the periodic table
- 12. it is a negative charge