Across
- 2. the center of an atom
- 4. the combined number of protons and neutrons found in a nucleus
- 5. neutrally charged in the nucleus
- 7. positively charged in the nucleus
- 8. stands for atomic mass unit
- 9. houses information on an element on the periodic table
Down
- 1. an abbreviation of the element
- 3. negatively charged around the nucleus
- 4. the number in the top left corner of the element box, tell how many protons/electrons
- 6. from the greek word "atomos" meaning indivisible