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20 Cards in this Set
- Front
- Back
What is the definitions for atom?
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the basic unit of matter
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What is the definitions for 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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What is the definitions for electron?
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negatively charged particle; located outside the atomic nucleus
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What is the definitions for element?
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substance consisting entirely of one type of atom
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What is the definitions for 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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What is the definitions for compound?
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substance formed by the chemical combination of two or more elements in definite proportions
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What is the definitions for ionic bond?
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bond formed when one or more electrons are transferred from one atom to another
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What is the definitions for ion?
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atom that has a positive or negative charge
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What is the definitions for covalent bond?
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bond formed by the sharing of electrons between atoms
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What is the definitions for molecule?
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smallest unit of most compounds
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What is the definition of van der Waals Force?
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a slight attraction that develops between the oppositely charged regions of nearby molecules
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What is the definition of cohesion?
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attraction between molecules of the same substance
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What is the definition of adhesion?
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attraction between molecules of different substances; in plants, attraction between unlike molecules
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What is the definition of mixture?
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materials composed of two or more elements or compounds that are physically mixed together but not chemically combined
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What is the definition of soulution?
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mixture of two or more substances in which molecules of the substances are evenly distributed
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What is the definition of solute?
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subtance that is dissolved in a solvent to make a solution
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What is the definition of solvent?
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substance in which a solute is dissolved to form a solution
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What is the definition of suspension?
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mixture of water and nondissolved materials
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What is the definition of pH scale?
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measurement system used to indicate the concentration of hydrogen ions (H+) in solution; ranges form 0 to 14
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What is the definition of acid?
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compound that forms hydrogen ions (H+) in solution
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