Across
- 2. a force that is created by humans or friction
- 5. a formula that shows the chemicals representation
- 7. the number that is given to an element to make it easier to find on the periodic table
- 9. a table of the chemical elements
- 10. positive particle
Down
- 1. a letter that represents an element which is also used in a chemical formula
- 3. smaller than or occurring within an atom.
- 4. a physical substance you can feel
- 6. negative particle
- 8. neutral particle