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20 Cards in this Set
- Front
- Back
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Basic unit of matter.
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Atom
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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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Nucleus
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Negatively charged particle; locatedd outside the atomic nucleus.
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Electron
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Substance consisting entirely of one type of atom.
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Element
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Atom of an element that had a number of neutrons different from that of other atoms of the same element.
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Isotope
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Substance formed by the chemical combination of two or more elements in definite proportions.
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Compound
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Bond formed when one or more electroms are transferred from one atom to another.
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Ionic Bond
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Atom that has a positive or negative charge.
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Ion
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Bond formed by the sharing of eleectrons.
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Convalent Bond
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Smallest unit of most compounds.
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Molecule
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A slight attraction that develops between the oppositely charged regions of nearby molecules.
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Van Der Waals Forces
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Attraction between molecules of the same substance.
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Cohesion
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Attraction between molecules of different substances; in plants. Attraction between unlike molecules.
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Adhesion
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Material composed of two or more elements or compounds that are physically mixed together but not chemically combined.
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Mixture
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Mixture of two or more substances in ehich the molecules of the substannces are evenly distributed.
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Solution
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Substance that is dissolved ina solvent to make a solution.
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Solute
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Substance in which a solute is dissolved to form a solution.
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Solvent
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Mixture of water and nondissolved materials.
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Suspension
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measurement system used to indicate the concentration of hydrogen ions (H+) in solution; ranges from 0 to 14.
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pH scale
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Compound that forms hydrogen ions (H+) in a solution.
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Acid
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