Across
- 2. The overall electrical charge of an atom
- 3. The dense center of the atom, containing protons and neutrons.
- 4. The tiny, negatively charged particle that travels around the nucleus.
- 7. A scientist who proposed the existence of atoms in ancient Greece.
- 8. A positively charged particle found in the nucleus.
Down
- 1. A neutral or charged group of atoms bonded together.
- 5. Tiny particle with no electrical charge, found in the nucleus.
- 6. The process of splitting atoms to release energy.