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27 Cards in this Set

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  • Back
atom
smallest unit of measure that cannot be broken down by chemical means
element
pure substance made of only one kind of atom
compound
a substance made up of the joined atoms of two or more different elements.
molecule
group of atoms held togther by covalent bond
chemical bond
force that bonds atoms
isotope
atoms of an element that contain different number of neutrons
covalent bond
formed when two or more atoms share electrons to form a molecule
polar molecule
molecules with an unequal distribution of electrical charge
hydrogen bond
a weak attraction between two polar molecules
ion
an atom or molecule that has gained or lost one or more electrons
ionic bond
bond in which electrons are transferred
cohesion
attraction between substances of the same kind
adhesion
an attraction between different substances
solvent
dissolves
solute
what is being dissolved
acids
compounds that form hydrogen ions when dissolved in water
bases
compounds that reduce the concentration of hydrogen in a solution
hydrogen ions
H+, acid
hydroxide ions
OH-, base
neutralization reaction
making reaction neutral
two products produced during neutralization reaction
water and salt
name some similarities between two isotopes of the same element
contains the same number of protons (have the same atomic number)
name some differences between two isotopes of the same element
different num of neutrons (different mass)
why do atoms share or transfer electrons?
to fill an outer shell or become stable
difference between polar and nonpolar molecules
polar molecules have an unequal distribution of charge and nonpolar do not
sodium chloride is?
a compound
what is a substance that would not dissolve well in water
oil becuase it is a nonpolar substance