Chemistry

2. The study of chemicals and their interactions
4. The extent to which a nuclear reactor deviates from a steady state
6. Ability to react with bases and certain metals to form salts
8. Chemical process by which organic compounds release energy
9. The combining power of an element, especially as measured by the number of hydrogen atoms it can displace or combine with
12. Occupies space and possesses rest mass
13. Slow precipitation of crystals from a solution of a substance
15. The transformation of one set of chemical substances to another
17. Solar, tidal, wind, electrical
18. What everything is made out of
19. Oxygen added to a compound

1. Light, Water and Carbon Dioxide
3. A table that contains 118 elements
5. An atom or molecule with a net electric charge due to the loss or gain of one or more electrons
7. A stable subatomic particle with a charge of negative electricity
10. Reacts with acids to form salts, and promotes certain chemical reactions.
11. A worldwide indicator
13. Reacted to produce heat
14. A distinct compound or substance, especially one which has been artificially prepared or purified
16. A solute is a substance dissolved in another substance