Across
- 2. the amount of protons in an element
- 3. Most outter shell
- 6. energy needed to remove one electron from a neutral atom
- 8. negatively charged particle in an atom
- 10. atom with an electric charge
- 14. table that contains all known elements
- 16. when two or more atoms join togther
- 17. chemical substance that cannot be broken down
- 19. positivly charged particle in an atom
Down
- 1. total number of particles in an atom
- 4. basic building block of all matter
- 5. bond between two non-metals
- 7. size of an atom
- 9. bond between metals and non- metals
- 11. a column in the periodic table
- 12. bond between two metals
- 13. ability to attract electrons
- 15. when an atom of the same elemnt has a diffrent amount of neutrons
- 18. a row in the periodic table
- 20. neutral particle in an atom