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Chem of Life 2.1-2.2

Vocabulary

QuestionAnswer
atom Smallest basic unit of matter.
element One type of atom; cannot be broken down by ordinary chemical means.
compound Substance made of atoms of different elements bonded together in a certain ratio like H-2-O (water) or C-O-2 (carbondioxide).
ion An atom that has gained or lost one or more electrons.
ionic bond Forms through electrical force between oppositely charges ions (+-).
covalent bond Forms when atoms share a pair of electrons.
molecule Two (2) or more atoms held together by covalent bonds.
atom Consists of 3 types of smaller particles: protons, neutrons, electrons.
hydrogen bond Attration between a slightly negative (-) and positive (+) atom (oftem oxygen or nitrogen).
cohesion Attraction among molecules of a substance.
adhesion Attraction among molecules of different substances.
solution Mixture of substances that is the same throughout.
solvent Substance present in great amount and that dissolves another substance.
solute The substance that is dissolved in a solvent.
acid Compound that releases a proton (H+) when it dissolves in water.
base Compound that removes protons (H+) from a solution.
PH The acidity of a solution (or concentration of ions (H+).
Created by: BerveJ
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