| A | B |
|---|
| Name | Definition |
| compound | a pure substance that contains two or more elements |
| chemical formula | contains atomic symbols and subscripts to show the elements and the numbers of atom of each element that combine to form a compound |
| molecule | a neutral particle that forms as a result of electron sharing |
| chemical bond | a force that holds atoms together in a compound |
| ionic bond | an electrical attraction between positively and negatively charged ions in an ionic compound |
| valence | the number of electrons in the outermost energy level of the atoms of an element |
| covalent bond | a chemical bond formed when atoms share electrons |
| ion | a charged particle that forms from an atom that has gained or lost electrons |
| metal | an element that is usually shiny, good conductors of heat and electricity, and solid at room temperature |
| metallic bond | a bond formed when many metal atoms share their pooled electrons |
| malleability | the ability of a material to be hammered or rolled into sheets |
| ductility | the ability of a substance to be pulled into wires |
| crystal | a regular, repeating arrangement of atoms, ions, or molecules |
| unit cell | the smallest repeating pattern that shows how the atoms, ions, or molecules are arranged in a crystal |
| polymer | a covalent compound made up of many small, repeating units linked together in a chain |
| monomer | a small molecule that forms a polymer chain |
| element | a pure substance that can be identified by the number of protons in the nucleus of it’s atoms |
