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8th-ChemistryVocab
8th Grade Chemistry Vocabulary
| Question | Answer |
|---|---|
| Electron Shell | A specific area where electrons of the same energy level are found |
| Element | A pure substance that cannot be separated into simpler substances by physical or chemical means |
| Atom | The smallest unit of an element that has all of the properties of that element containing a nucleus within an electron cloud |
| Proton | A positively charged subatomic particle in the nucleus of an atom and contributes to the mass of the atom |
| Electron | A negatively charged subatomic particle of the electron cloud; involved in the formation of chemical bonds |
| Neutron | The tiny, very dense, positively charged region in the center of an atom; made up of protons and neutrons |
| Nucleus | The very dense region consisting of protons and neutrons at the center of an atom |
| Atomic Symbol | A one- or two-letter notation used to represent an atom of a particular element |
| Amu unit | Amu stands for atomic mass unit and is used to indicate mass on an atomic or molecular scale |
| Valence electrons | The number of electrons with which a given atom generally bonds or number of bonds an atom forms |
| Electron shells | A grouping of electrons surrounding the nucleus of an atom |
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