| A | B |
|---|
| Acid | Can donate a proton or accept an electron pair |
| Atom | Basic unit of matter |
| Atomic Mass | Average mass of the atom of an element |
| Atomic Number | Number of protons in the nucleus of an atom |
| Bacteria | Simplest single cell that carries out all basic life activities |
| Base | Can accept a proton, release hydroxide ions or donate an electron pair. An alkali. |
| Binary Compound | Compound that contains 2 elements |
| Buffer | Solution that does not change significantly in PH when either acid or base is added |
| Chemical Bond | Force holding atoms together in a compound or molecule |
| Chemical Formula | Set of symbols and subscripts that tell the kinds of atoms and how many of each kind are in a compound |
| Chemical Process | Rearrangement of atoms or molecules to produce one or more new substances with new properties |
| Chemical Property | Describes how a substance changes into a difference substance |
| Chemical Reaction | Chemical change in which elements are combined or rearranged |
| Chemistry | Study of matter and how it changes |
| Compound | Substance formed when two or more elements are joined together |
| Covalent Bond | Bond resulting from the sharing of one or more pairs of electrons between two atoms |
| Crystalline | Substance with a regularly repeating arrangement of atoms |
| Diversity | Differing from one another |
| Electron | Tiny particle in an atom that moves around the nucleus, Negative electrical charge |
| Electron Cloud | The space effectively occupied by electrons in an atom |
| Electron Shell | Specific energy level in which electrons orbit the nucleus |
| Element | Substance that cannot be separated into other kinds of substances |
| Element Symbol | 1, 2, or 3 letters that represent the name of an element |
| Empirical Formula | Simplest formula for a compound |
| Hydrogen Bond | Weak electrical attraction between the slight positive charge on a hydrogen atom and a slight negative charge on another atom |
| Hydrophilic | Water-loving, Polar molecules |
| Hydrophobic | Water-hating, Non polar molecules |
