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matter
| Term | Definition |
|---|---|
| Matter | A substance that has mass and occupies space |
| Mass | The amount of matter in a substance (objects) |
| Volume | The amount of space an object takes up |
| Physical change | A change to a sample of matter in which some properties of the material change, but the identity of the matter does not. |
| Solid | A state of matter that retains its shape and density (degree of compactness). |
| Liquid | A state of matter that conforms to the shape of a container in which it is held. |
| Gas | A state of matter that has no fixed shape and no fixed volume. |
| Chemical change | Occurs whenever matter changes into an entirely different substance with different chemical properties. |
| Element | a pure substance made of only 1 type of atom that can not be broken down further into other substances. |
| Compounds | -A physical change takes place when two or more elements, compounds, or substances are blended but do not combine chemically |
| Mixtures | -A physical change takes place when two or more elements, compounds, or substances are blended but do not combine chemically |
| Atom | the smallest building blocks of matter. |
| Electron | A negative subatomic particle that is located outside the nucleus that makes up the atom. |
| Proton | A positive subatomic particle that is located in the nucleus that makes up the atom. |
| Neutron | a neutral (no electric charge) subatomic particle that is found in the nucleus (center of the atom) that makes up the atom. |
| Atomic number | the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table. |
| Atomic mass (weight) | Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. |
| A family, group, of elements | -a vertical column on the periodic table, where all the elements within that column share similar chemical properties due to having the same number of valence electrons in their outermost shell |
| A row or period | a horizontal line on the periodic table |