Across
- 4. Ions- positive and negatively charged atoms that bond with their opposites
- 6. a group of 2 or more atoms that are bonded together
- 8. represents the number of units of each substance
- 9. atoms of 2 or more elements combined
- 10. the substance that exists before the reaction
Down
- 1. substances produced by the reaction
- 2. a basic unit of chemical element and life
- 3. the number of atoms in a compound
- 5. charged atoms
- 7. substance made up of atoms with the same identity that cannot be broken down