Across
- 3. determind without a chemical reaction
- 6. cannot be reduced without loss of identity
- 7. a chemical combination of matter in fixed proportions
- 9. form in changed without becoming a new substance
- 10. an ion with a negative electrical charge
- 11. a chemical combination of two or more atoms in definite proportions
- 13. occupies space and has mass
- 14. the basic unit of matter
Down
- 1. change in the chemical composition or makeup of a substance
- 2. rapid oxidation of a substance accompanied by the production of heat and light
- 4. these are chemical compounds of two or more atoms
- 5. a chemical combination of atoms of the same element, in fixed proportions
- 7. determind without a chemical reaction
- 8. physical combination of matter in fixed proportions
- 12. the science that deals with the composition, structures, and proper-ties of matter and how matter changes under differnet conditions