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Science Vocab
| Term | Definition |
|---|---|
| Model | an example that explains or summarizes a specific concept, method, or object |
| Atom | the smallest unit of matter that maintains properties of its element |
| Nucleus | the center of an atom, which holds protons and neutrons |
| Proton | a type of subatomic particle; has a positive charge |
| Neutron | a type of subatomic particle; has no charge |
| Electron | a type of subatomic particle; has a negative charge |
| Atomic Number | the number located above the element's symbol on the Periodic Table; tells the amount of protons and electrons in the element's isotope |
| Atomic Symbol/Nuclear Symbol/Chemical Symbol | consists of three main parts: an element's symbol, the element's atomic number, and the mass number for its specific isotope |
| Subatomic Particle | the particles found within an atom (protons, electrons, and neutrons) |
| Molecule | the smallest measurable unit of a substance that keeps all physical and chemical properties of said substance |
| Lewis Structures | diagrams that show the bonding between atoms of a molecule and lone pairs of electrons that may also exist in the molecule |
| Bohr Model | an atom model created by Niels Bohr; consists of a small, positively charged nucleus orbited by negatively-charged electrons |
| Electron Shell | the outside portion of an atom surrounding the atom's nucleus |
| Valence Electron | en electron that is most likely to be involved in a chemical reaction |
| Matter | anything that has mass or takes up space |
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