Across
- 2. Atoms of the same element with different numbers of neutrons.
- 6. Two or more atoms bonded together.
- 7. A substance formed when two or more chemical elements are chemically bonded together.
Down
- 1. The smallest unit of a chemical element.
- 3. A negatively charged particle orbiting the nucleus of an atom.
- 4. A particle with no charge found in the nucleus of an atom.
- 5. A substance that cannot be broken down into simpler substances by chemical means.
- 8. A positively charged particle found in the nucleus of an atom.