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20 Cards in this Set

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