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mohrchemistry

Chemistry of Life 2.1-2.2

QuestionAnswer
atom basic unit of matter
nucleus center of an atom that contains protons and neutrons
electron negatively charged particle
element pure substance that consists of entirely one type of atom
isotope atoms of the same element that differ in the number of neutrons they contain
compound substance formed by the chemical combination of two or more elements in definite proportions
ionic bond formed when one or more electrons are transferred from one atoms to another
ion an aotm that has gained or lost electrons
covalent bond formed when electrons are shared between atoms
molecule compound that forms when atoms are joined covalently
van der waals forces that develop due to the slight attraction between oppositely charged regions of nearby molecules; helps geckos grip to vertical surfaces
cohesion attraction between molecules of the same substance
adhesion attraction between molecules of different substances
surface tension A property of water arising from polar bonds at or near the surface of the liquid
capillary action The attraction of water molecules and the molecules of a narrow tube so that water will climb in defiance of gravity
polar unequal distribution between oxygen and hydrogen atoms causes water to become this
mixture material composed of two or more elements or compounds that are physically not chemically combined
solution mixture in which all of the components are evenly distributed
solute substance that is dissolved
solvent substance in which the solute dissolves
universal solvent water
specific heat the amount of heat energy needed to raise the temperature of one gram of a substance one degree Celsius
acid any compound that forms H3O+ ions in solution
base any compound that forms OH- ions in solution
neutral equal amounts of H3O+ and OH- ions in solution
buffer weak acid or base that can react with strong acids or bases to prevent sharp, sudden changes in pH
Created by: mohre
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