Across
- 3. negatively charged ion
- 5. a minute portion of matter.
- 6. positively charged ion,
- 7. penetrating form of electromagnetic radiation transmission of energy in the form of waves
- 9. any substance composed of molecules
- 11. everything around you is made up of .
- 12. the action of dividing or splitting something
- 13. the central and most important part
- 16. alpha
- 18. mass of an atom of a chemical element
- 19. result of joining two or more things together
- 20. same # of protons but not neutrons
- 21. uppercase/lowercase Β β
Down
- 1. molecular ion is a covalently bonded
- 2. atom or molecule with a net electriccharge
- 4. without an electric charge same weightas
- 8. consist of a nucleus made of protons and neutron
- 10. positive electric charge
- 14. negative charge
- 15. total number of protons and neutrons
- 17. # of protons in the nucleus of an atom