Across
- 1. section of elements that don't contain metal
- 4. Number of protons and electrons combined.
- 6. Electrically neutral particles in the nucleus without charge.
- 7. The group on the right of periodic table
- 8. Group with the most elements
- 9. Number of protons=number of electrons
Down
- 2. The small positively charged center of an atom.
- 3. Particles with an electric charge of 1-
- 4. First group farthest left on periodic table
- 5. particles with an electric charge of 1+