chemistry

3. a homogeneous mixture of two or more substances
4. reaction which nuclei combine to form more massive nuclei
6. a process in which a substance is changed into another
8. any source of usable power
10. a liquid substance capable of dissolving other substances
11. a chemical substance present at the start of a process
12. a substance formed by chemical union of two or more elements a substance that cannot be separated into simpler substances a particular kind of matter with uniform properties
14. a chemical reaction and its reverse proceed at equal rate
15. a stable particle with positive charge
16. the molecular mass of a substance expressed in grams
18. the property of a body that causes it to have weight
19. the path of an electron around the nucleus of an atom
21. the amount per unit size

1. the smallest component of an element
2. a constant number that serves as a measure of some property a basic attribute shared by members of a class
3. a particular kind of matter with uniform properties
5. resistance of a liquid to flowing
6. energy transmitted in the form of rays or waves or particles a small portion of matter
7. that which has mass and occupies space
9. the positively charged dense center of an atom
13. a subatomic particle with zero charge
17. an elementary particle with negative charge
20. a naturally occurring or synthetic compound