| A | B |
|---|
| atom | basic unit of matter |
| electron | negatively charged subatomic particle found around the nucleus of atoms |
| nucleus | central portion of the atom |
| element | pure substance that consists entirely of one type of atoms |
| isotope | atoms of the same element that contain same number of protons but different number of neutrons |
| mass number | total number of protons and neutrons |
| compound | subtance made up of 2 or more elements in a specific ratio |
| atomic number | total number of protons in an atom |
| proton | positively charged subatomic particle found in the nucleus of an atom |
| neutron | subatomic particle found in the nucleus of an atom that has no electric charge |
| ionic bond | bond formed when one or more electrons are transferred between atoms |
| ions | charged atom (lost or gained electrons to become this way) |
| covalent bond | bond formed when electrons are shared between atoms |
| molecule | smallest unit of most compounds |
| Van der walls forces | AKA hydrogen bond, attraction of 2 different molecules that have slight positive and negative charges |
