Across
- 1. number the number of protons and neautrons in the nucleus
- 4. goes across in the periodic table in rows
- 5. electrons and neutrons together
- 6. lots of elements in a table
- 8. found in the periodic table
- 10. part of the atom that is negative
- 11. Found in the middle of the electronic shell
Down
- 2. number the number of protons which equels the number of electrons
- 3. opposit to period in the periodic table
- 4. part of the atom that is positively charged.
- 7. shell runs around the edge of the nucleus
- 9. part of the atom that is neautrul