Chemical Bonds - when atoms stay
close together, held by attractions
iconic bond - when two ions with
opposite charges attract each other;
when the attraction holds them together
ion - an atom or molecule with
an electrical charge resulting
from a gain or loss of one or
more electrons
salt - a synonym for an iconic
compound; a compound resulting
from the formation of ionic bonds;
sodium chloride is a familiar type
covalent bond - strong chemical bond in which two
atoms share one or more pairs of outer-shell
electrons
molecule - two or more atoms
held together by covalent bonds
double bond - a type of covalent
bond in which two atoms share
two pairs of electrons; symbolized
by a pair of lines between the
bonded atoms
single bond - a type of
covalent bond formed by the
sharing of a pair of electrons;
symbolized by one line
between the bonded atoms
polar covalent bonds - the unequal
sharing of electrons when the pulling of
shared, negatively shared electrons
closer to the more electronegative atom
makes the atom partially negative and
the other atom partially positive
polar molecule - unequal
distribution of charges, a molecule
consisting of polar covalent bonds
non polar covalent bonds - the bonds in
such molecules when the electrons are
shared equally between the atoms
electronegativity - an atom's
attraction for shared electrons
hydrogen bond - a type of weak chemical
bond formed when the partially positive
hydrogen atom participating in a polar
covalent bond in one molecule is attracted
to the partially negative atom participating
in a polar covalent bond in another molecule