Chemistry Review

2. a substance produced in a chemical reaction
4. a scientific law stating that no energy is created or destroyed during energy transfer
5. anything that has mass and takes up space
7. an increase in volume
9. a measure of the quantity of matter
13. the name chemists use for a substance, which refers to the names of the elements in that substance
15. a phase of matter that has no definite shape or volume. Particles of gas fly independently through space.
16. a code that represents the number and kinds of atoms in one particle of a substance
18. a fundamental substance that cannot be broken into simpler substances by chemical or physical processes. Made of only one type of atom.
19. the transfer of energy (heat) from one particle to another as a result of contact
20. a phase of matter that has definite volume and definite shape. The particles of a solid are tightly bonded and cannot move around (but they do move slightly)
22. a measure of the average kinetic energy of the particles in a substance
23. a substance defined by a particle composed of two or more different kinds of atoms
25. an attractive force between atoms
26. a phase of matter that has definite volume but no definite shape. Loosely bonded particles in liquid can flow over and around one another.

1. the reduction of volume of a sample of matter as a result of cooling
3. a starting substance in a chemical reaction
6. the movement of energy from one location to another
8. a condition in which a system is experiencing no net change
10. a type of matter defined by a unique particle
11. a process during which the atoms of starting substances (reactants) rearrange to form new substances (products)
12. energy of motion
14. an increase in volume
17. the smallest particle of an element
21. energy transfer that increases the kinetic energy of a substance’s particles
24. a particle made of two or more atoms that are held together with strong (covalent) bonds