| A | B |
|---|
| metal | elements that are shiny, malleable and conduct electricity |
| nonmetal | elements that are brittle, dull and come in all 3 states |
| metalloids | elements with properties of both metals and nonmetals |
| solution | a substance that is dissolved in water (aqueous) |
| exothermic reaction | temperature rises, energy is given off |
| endothermic reaction | temperature decreases, energy is absorbed |
| reactant | chemicals that go into a chemical reaction |
| product | chemicals that are created in a chemical reaction |
| ionic compounds | metal + nonmetal; conduct electricity |
| molecular compounds | nonmetal + nonmetal; includes organic compounds |
| mono, di, tri, tetra | prefixes used to name molecular compounds |
| alkali metals | react readily with water, give 1 electron |
| alkaline earth metals | react with oxygen, give 2 electrons |
| halogens | most reactive nonmentals; highly corrosive |
| noble gases | inert; do not react; stable elements |
| conservation of mass | mass into a reaction= mass out of a reaction |
| physical changes | dissolving, evaporating of mixtures |
| chemical changes | colour change, temperature change, new substance made |
| CH4 | carbon tetrahydride |
| atomic number | number of protons and electrons |
| atomic mass | protons + neutrons in an atom |
| LiF | ionic compound; dissolves in water and conducts electricity |
| conservation of matter | elements into a reaction = elements out of a reaction |
| rate of chemical reaction | crushing, high temperature, agitation |
| combustion | oxidation reaction that produces carbon dioxide and water |
