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11 Cards in this Set
- Front
- Back
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Atom
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basic unit of matter
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Nucleus
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the center of the atom which contains the protons and neutrons; in cells, structure that contains the cell's genetic material (DNA) and controls the cell's activities
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Electron
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negatively charged particle; located outside the atomic nucleus
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Element
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substance consisting entirely of one type of atom
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Isotope
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atom of an element that has a number of neutrons different from that of other atoms of the same element
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Compound
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substance formed by the chemical combination of two or more elements in definite proportions
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Ionic Bond
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bond formed when one or more electrons are transferred from one atom to another
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Ion
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atom that has a positive or negative charge
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Covalent Bond
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bond formed by the sharing of electrons between atoms
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Molecule
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smallest unit of most compounds
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van der Waals forces
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a slight attraction that develops between the oppositely chargedregions of nearby molecules
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