Across
- 2. describes a reaction that absorbs heat
- 6. the composition of a substance is changed
- 11. does not alter the chemical properties of a substance
- 12. covalently bonded group of atoms with a net electrical charge
- 15. the one, two, or three letter designation of an element
- 17. the smaller number written after a chemical symbol
- 18. simplest integer ratio in a compound
- 20. information that is either counted or measured
Down
- 1. smallest unit of a covalently bonded substance
- 3. information that is neither counted or measured
- 4. symbols and subscripts use to represent a chemical substance
- 5. a substance formed in a chemical reaction
- 7. another term for decomposition into simpler substances
- 8. formed by two identical covalently bonded atoms
- 9. an element takes the place of a less reactive element
- 10. ions exchange places
- 13. describes a reaction that releases heat
- 14. two or more substances combine to form one product
- 16. the number placed before a formula
- 19. a starting substance in a chemical reaction