Chemistry
Across
- 2. The number of electrons in the innermost electron shell in an atom.
- 3. Negative charge in an atom.
- 5. Positive charge in an atom.
- 7. The center of an atom that has protons and neutrons.
Down
- 1. The 3 states of matter are _______, liquids, and gases.
- 4. The number of electrons on the outer electron shells of an atom.
- 6. No charge particle in an atom.