Across
- 4. a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
- 7. electron in the outer most shell
- 10. a+b=ab
- 12. ab=a+b
Down
- 1. ab+cd=ac+bd
- 2. ab+c=ac+b
- 3. outer most shell
- 5. particle that has a positive charge equal in magnitude to a unit of electron charge
- 6. the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
- 8. any particle of matter at its most basic level which contains at least one proton
- 9. neutral subatomic particle
- 11. outer most part of the atom