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Atoms and Elements
Atoms, Elements, and the Periodic Table Vocabulary Review
| Term | Definition |
|---|---|
| Atom | The smallest particle of matter that still has the properties of an element. |
| Atomic Mass | The average mass of the isotopes of an element. |
| Atomic Number | The number of protons in an atom. |
| Compound | A combination of two or more elements that have chemically bonded. |
| Electron | The negative charged particles in an atom that surround the nucleus. |
| Element | Matter made of only one kind of atom. |
| Isotope | Different forms of an atom of the same kind of element that have a different number of neutrons. |
| Law of Conservation of Matter | Scientific law that states that matter is neither created nor destroyed, just changed. |
| Mass Number | The number of protons plus neutrons in an atom or the atomic mass rounded to the nearest whole number. |
| Matter | Anything that has mass and takes up space. |
| Metal | Usually shiny, good conductors of heat and electricity, solids, malleable, ductile. |
| Metalloid | Characteristics of metals and nonmetals. |
| Mixture | Combination of elements where they are not chemically bonded. |
| Neutron | Particle with no charge (neutral). |
| Nonmetal | Opposite of metal. |
| Nucleus | The center of an atom. |
| Proton | Particle with a positive charge. |
| Substance | Matter with the same composition and properties throughout. |
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Iris_Sanchez95