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this stack will help you learn the basics about atoms

Atomic Number Number of protons and electrons in an atom
Atomic Mass total weight of protons and neutron (everything in the nucleus)
atom smallest unit of matter
neutron a subatomic particle that has no charge and that is found in the nucleus of an atom
proton a subatomic particle that has a positive charge and that is found in the nucleus of an atom. Represented by the atomic number
electron a subatomic particle that has a negative charge- found outside the nucleus
element A pure substance made up of only one kind of atom
compound a substance made up of atoms of two or more different elements joined by chemical bonds
mixture a combination of two or more substances that are not chemically combined
molecule a group of atoms bonded together
pure substance a substance that cannot be separated by physical means; elements and compounds
homogeneous mixture a mixture that is evenly mixed; also called a solution
precipitate an insoluble substance that is produced as a result of a chemical reaction
heterogeneous mixture a mixture that is unevenly mixed
Created by: meekinsscience