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Vocab
| Term | Definition |
|---|---|
| Atom | An atom is the basic unit and building block of all matter in the universe |
| Element | An element is a pure substance made of only one type of atom, defined by the number of protons in its nucleus |
| Proton | A proton is a stable subatomic particle with a positive electric charge of +1 e, found inside the nucleus of every atom |
| Neutron | A neutron is a subatomic particle with no electrical charge and a mass slightly greater than that of a proton |
| Electron | An electron is a subatomic elementary particle that carries a negative electrical charge (-1.602 × 10⁻¹⁹ coulombs) and orbits the nucleus of an atom |
| Isotope | Isotopes are variants of a chemical element that have the same number of protons and electrons, but a different number of neutrons in their atomic nuclei |
| Ion | An ion is an atom or molecule that has a net electrical charge because it has lost or gained one or more electrons |
| compound | A compound is a thing, substance, or structure made by combining two or more separate elements, parts, or ingredients |
| molecule | A molecule is a group of two or more atoms held together by chemical bonds |
| Ionic bond | An ionic bond is a type of chemical bond formed through the electrostatic attraction between oppositely charged ions |
| covalent bond | A covalent bond is a type of chemical bond where two nonmetal atoms share one or more pairs of valence electrons to achieve a stable electron configuration. |
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