Across
- 4. the process when oxygen combines with another element
- 5. mass per unit volume of a substance
- 7. two or more atoms joined together
- 9. substance with a pH higher than seven
- 10. combination of two or more substances that are not chemically combined
- 12. an atomic particle with no electric charge
- 13. a compound with a pH of less than 7
- 14. negatively charged atomic particle
- 16. formed by the reaction of an acid and a base
- 17. a metallic mixture of two or more elements
Down
- 1. a material that allows the flow of energy such as heat or electricity
- 2. positively charged atomic particle
- 3. chemical processes as they relate to living organisms
- 6. a pure substance made up of two or more elements
- 8. pure chemical substance that is made up of one type of atom
- 11. an atom's central core
- 13. the smallest unit of an element
- 15. a substance that speeds up the rate of a chemical reaction