Across
- 4. change of one substance to another
- 8. element composed of one type
- 10. a unit of temp
- 12. sum of number of protons and neutrons
- 14. standards used in gas equations
- 16. a chemical bond formed when two atoms share two electrons
- 17. substances that are made
- 19. energy possessed by the objects motion
Down
- 1. substance that react
- 2. melting and evaporation
- 3. good conducotrs of heat and electricity
- 5. usually gasses or brittle solids at room temp
- 6. change in size, shape, or state
- 7. the vertical columns in the periodic table
- 9. Avogadros number of anything
- 11. force of attraction between opposite charges
- 13. flexible
- 15. can be hammered
- 18. horizontal rows of elements
- 20. freezing and condensation