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unit 2

TermDefinition
atom basic unit of matter
nucleus center of an atom
electron negatively charged ion
element each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances
isotope each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei
mas number the total number of protons and neutrons in a nucleus
atomic number the number of protons in the nucleus of an atom,
compound a thing that is composed of two or more separate elements
ionic bond the bonding between a non-metal and a metal, that occurs when charged atoms (ions) attract after one loses one or more of its electrons, and gives it to the other molecule, for example sodium and chlorine.
ion an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
covalent bond a chemical bond that involves the sharing of electron pairs between atoms.
molecule a group of atoms bonded together,
van der waals forces weak, short-range electrostatic attractive forces between uncharged molecules,
water H2O
hydrogen bond a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
cohesion the sticking together of particles of the same substance.
adhesions the sticking together of particles of different substances.
heat capacity the number of heat units needed to raise the temperature of a body by one degree.
mixture a combination of substances together.
solution the process or state of being dissolved in a solvent.
solvent able to dissolve other substances.
solute the minor component in a solution, dissolved in the solvent.
suspension a mixture in which particles are dispersed throughout the bulk of a fluid.
pH scale a measure of how acidic or basic a substance is
acid containing acid or having the properties of an acid; in particular, having a pH of less than 7.
base a substance capable of reacting with an acid to form a salt and water, or (more broadly) of accepting or neutralizing hydrogen ions.
buffer a solution that resists changes in pH when acid or alkali is added to it.
macro molecules/polymers a molecule containing a very large number of atoms, such as a protein, nucleic acid, or synthetic polymer./ substance that has a molecular structure consisting chiefly or entirely of a large number of similar units bonded together
monomers a molecule that can be bonded to other identical molecules to form a polymer.
organic compound
monosaccharides
disaccharides
unsaturated fats
nucleotids
amino acids
chemical reaction
reactants
products
catalyst
enzymes
activation energy
substrates
Created by: ebrock18