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Biology Chapter 2

atom smallest basic unit of matter.
element substance made of only one type of atom that cannot be broken down by chemical means.
compound substance made of atoms of different elements that are bonded together in a particular ratio.
ion atom that has gained or lost one or more electrons.
ionic bond chemical bond formed through the electrical force between oppositely charged ions.
covalent bond chemical bond formed when two atoms share one or more pairs of electrons
molcule two or more atoms held together by covalent bonds; not necessarily a compound.
hydrogen bond attraction between a slightly positive hydrogen atom and a slightly negative atom.
cohesion attraction between molecules of the same substance.
adhesion attraction between molecules of different substances.
solution mixture that is consistent throughout; also called a homogeneous mixture.
solvent mixture that is consistent throughout; also called a homogeneous mixture.
solute substance that dissolves in a solvent and is present at a lower concentration than the solvent.
acid compound that donates a proton when dissolved in a solution.
base compound that accepts a proton when dissolved in a solution.
pH mixture that is consistent throughout; also called a homogeneous mixture.
Created by: creasoner
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