Across
- 4. are neutral, have mass, and determine the isotope.
- 5. a charged atoms.
- 6. smallest amount or unit of an element.
- 7. variation of an element (has a different number of neutrons).
Down
- 1. are positively charged, have mass, and determine the chemical element.
- 2. are negatively charged, have very little mass, and determine ion state and chemical reactivity.
- 3. Individual elements that are combined.