Across
- 2. total mass of the reactants equals total mass of the _______
- 5. equation using formulas and symbols instead of words to represent a chemical reaction
- 7. a reaction where energy is absorbed
- 8. most decomposition reactions require ____.
- 9. during a chemical reaction, matter is not ____ or destroyed
- 10. matter can enter from or escape to the surroundings
- 12. AC-->A+C
- 15. AB+CD-->AD+CB
- 17. a number that indicates the ratio of elements in a compound
Down
- 1. a reaction where energy is released
- 3. occurs when a substance reacts with oxygen to produce energy in the form of heat or light
- 4. matter is not allowed to enter or leave
- 5. symbols and numbers that represents atoms
- 6. total mass of the _____ equals total mass of the products
- 9. a number in front of the element
- 11. A+BC-->AC+B
- 13. A+B-->AB
- 14. what the arrow means
- 16. during a chemical reaction, matter is not created or _____