Across
- 3. This scientist created a system to visualize valence electrons using dots. The system was named after him.
- 4. the branch of science that studies the properties and behaviors of substances
- 6. a molecule made up of two or more atoms
Down
- 1. the center of the atom that contains most of the mass
- 2. a negatively charged particle that has almost no mass
- 5. a prediction about something that can be proved through observations