The elements are listed in the periodic table. Each element has a one or two letter symbol.
Organic compounds are ones with a carbon skeleton.
Inorganic compounds do not have carbon skeleton. Ionic compounds are ones that contain metal and nonmetal or ions. Covalent compounds are ones that contain two or more nonmetals, excluding ions. Acids are compounds that are of the general formula HA, where H is hydrogen and A is any general anion other than oxide or hydroxide. Can be separated by physical means Homogeneous mixtures are the same consistency and composition throughout the sample, also known as solutions.