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Structure of Matter
| Term | Definition |
|---|---|
| matter | anything that has mass and takes up space; occurs as elements, compounds, and mixtures |
| atom | a small particle of an element; made of electrons, protons, and neutrons |
| law of conservation of matter | states that matter is not created or destroyed, it only changes form |
| electron | negatively charged particles surrounding an atom |
| nucleus | the positively charged central part of an atom |
| proton | positively charged particles in the nucleus of an atom |
| neutron | uncharged particles found in the nucleus of an atom |
| element | matter made up of only one kind of atom |
| substance | matter with the same composition and properties throughout; elements are substances |
| compound | a substance whose smallest until is made up of atoms of more than one element |
| mixture | formed when two or more substances come together but don't combine to make a new substance |
| crystal | solid material who's atoms, molecules, or ions are arranged in an ordered pattern |
| molecule | simplest unit of a chemical compound that can exist; formed when two or more atoms join together chemically |
| solid | a state of matter with a definite volume and shape |
| pure substance | a single substance, either an element or a compound, with definite composition and properties |
| isotope | atoms of the same element with the same number of protons, but a different number of neutrons |
| subscript | the number written below and to the right of a chemical symbol that shows the number of that specific type of atoms that are present |
Created by:
MsHollinger
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