Chemistry

3. Ability of a substance to conduct electricity.
4. Basic unit of matter composed of protons, neutrons, and electrons.
7. Substance made of two or more different elements chemically combined.
8. Substance that cannot be broken down into simpler substances by chemical means.
11. Amount of matter in an object.
14. Substance that participates in a chemical reaction.
15. State of matter such as solid, liquid, or gas.
16. Homogeneous mixture of two or more substances.
18. Tabular arrangement of chemical elements.
19. Connection between atoms in a molecule.

1. Substance formed as a result of a chemical reaction.
2. Substance that speeds up a chemical reaction without being consumed in the process.
4. Substance with a pH less than 7, often corrosive and sour in taste.
5. Chemical compound composed of two or more atoms bonded together.
6. Atom or molecule with an electric charge.
9. Measure of the average kinetic energy of particles in a substance.
10. Substance with a pH greater than 7, often bitter and slippery in feel.
12. Process in which atoms are rearranged to create new substances.
13. Number of bonds an atom can form with other atoms.
17. State of matter with no definite shape or volume.