Across
- 3. standard unit of energy
- 5. valence electrons are shared to form a pair
- 10. a change that alters a substance without changing its composition
- 12. when a compound/element combines with 02 to form an oxide and sometimes H20
- 14. releases energy from chemicals into surroundings
- 15. tastes bitter, feel slippery, ph 7-14, turns litmus paper blue
- 19. measure of hotness and coldness (C or F)
- 20. a unit of measurement to describe the amount of a substance (6.02 x 10^23)
Down
- 1. a substance that exists before a reaction occurs
- 2. a change in matter in which new materials are formed
- 4. absorbs heat from its surroundings
- 6. transfer of electrons between metals and non-metals
- 7. when several reactants form one product
- 8. tastes sour, turns litmus paper red, ph 0-7
- 9. amount of force applied to a surface
- 11. the mass of one mole of a substance (grams per mol)
- 13. measure of amount of space that matter occupies
- 16. when one react forms several products
- 17. solution that uses water as a solvent to break down a substance
- 18. a substance that exists after a reaction occurs