A compound is a pure substance composed of more than one atom A
chemical bond is a mutual electrical attraction between atoms in a
compound Compounds can either be molecular or ionic
Slide 3
There are two types of bonding: 1. Ionic Bonds result from the
transfer of electron from metal to nonmetal 2. Covalent Bonds
result from the sharing of electrons between two atoms Polar
covalent = unequal sharing Non-polar covalent = equal sharing
Slide 4
Composed of oppositely charged ions Composed of Metal +
nonmetal Metals form cations (+) Low IE and low EA mean these atoms
lose electrons readily Nonmetals form anions (-) high IE and high
EA mean these atoms gain electrons readily Electrically neutral
Formula unit: lowest whole # ratio of ions in the compound EX:
NaCl, CaF 2
Slide 5
Solids at room temperature High melting point (>400 0 C)
Soluble in water Conduct electricity when melted or dissolved in
water
Slide 6
Composed of two or more nonmetals Involve covalent bonding
(Electrons are shared) Sharing tricks each element into thinking
that their outer shells are filled Molecule: smallest unit of a
molecular compound Molecular formula: tells the type and number of
atoms in a molecule Ex: H 2 O, CO 2, CO
