Across
- 2. mass of an atom
- 5. acts a catalyst
- 7. releases heat
- 9. an atoms give up electrons for another atom
- 11. an element between metals and nonmetals
- 15. nonmetallic element
- 17. positive charged ion
- 18. subtances in a chemical reaction
- 19. chemical element with atomic number 5
- 20. energy stored in bonds
Down
- 1. the unit of work or energy
- 3. solid to the gaseous state
- 4. absorbs heat
- 6. chemical element,lacks material of metal
- 8. chemical element number 7
- 10. volume at a constant temperature
- 12. the mass of the substance
- 13. molecules settle out of solution
- 14. positive electric charge
- 16. negative electric charge