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24 Cards in this Set

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acid
a substance that increased the hydrogen ion concentration of a solution (H+) and has a pH below 7
adhesion
attraction between different kinds of molecules
atom
the smallest particle of an element that has the characteristics of that element
base
a substance that reduces the hydrogen ion (H+) concentration of a solution and has a pH above 7
chemical property
when two elements are combined chemically the new compound will have different properties than the two elements did alone
cohesion
binding together of like molecules often by hydrogen bonds
compound
substance that is composed of atoms of two or more different elements that are chemically combined. the elements tat are chemically combined no longer have their original properties
covalent bond
stong bond created when two elements share electrons. by sharing electrons each atom becomes more stable. the new molecule formed has no overall charge
diffusion
net movement of particles from an area of higher concentration to an area of lower concentration
electrons
negatively charged particles found in the region of space surrounding the nucleus of an atom
element
substance that can't be broken down into simpler chemical substacnes
energy
ability to cause change or to perform work
hydrogen bond
a weak bond due to the attraction of opposite charges
ionic bond
attractive forces berween two ions of opposite charge
mixture/solution
combination of substances in which the individual components retain their own properties and don't combine chemically
monomer
the repeated units that serve as the building blocks of a polymer
neutrons
particles that do not have a charge found in the nucleus of an atom
nucleus
the center of an atom that contains protons and neutrons
osmosis
the diffusion of water across a selectively permeable
pH
measure of hydrogen ion concentration ranging from 0-14
polar molecule/polarity
molecule with an unequal distribution of charge; a molecule with a positive and negative end like water
polymer
large molecule formed when many small molecules bond together
protons
positively charged particles found in the nucleus of an atom
surface tension
measure of how difficult it is to stretch or break the surface of a liquid. water has a high surface tension because of hydrogen bonding of surface molecules