| A | B |
|---|
| Element | substance that can't be broken down into simpler substances by chemical reactions |
| Atom | smallest possible unit of an element |
| Proton | positively charged subatomic particle |
| Neutron | neutral subatomic particle |
| Electron | negatively chaged subatomic particle |
| Atomic Number | # of protons |
| Atomic Mass | # of protons + # of neutrons |
| Isotopes | atoms with the same atomic # but different atomic mass |
| Molecule | chemically combined atoms |
| Compound | combination of more than one type of atom |
| Covalent Bond | electrons are shared |
| Ionic Bond | electrons are transfered |
| Hydrogen Bond | weak attraction between positive hydrogen and neighboring negative atom |
| pH scale | measures concentration of hydrogen ions |
| Buffer | resists/minimizes changes in pH |
| Ion | atom/molecule that has gained/lost electron(s) |
| Nucleus | contains protons and neutrons |
| Electron Cloud | surrounds nucleus |
| Acid | high concentration of hydrogen ions |
| Base | low concentration of hydrogen ions |
