Across
- 1. Number The number of protons found in an atom's nucleus.
- 5. The positively charged center of an atom that contains protons and neutrons.
- 7. The combined number of protons and neutrons found in the nucleus.
- 8. A positively charged particle. (+ electrical charge)
Down
- 2. Symbol A letter used to abbreviate the name of a set of atoms or anelement.
- 3. A neutrally charged particle. (0 electrical charge)
- 4. contain the smaller parts of matter. These other parts do not have their own unique qualities.
- 6. A negatively charged particle. (- electrical charge)