Unit 5 Vocabulary
Ion – negatively or positively charged atom (monatomic).
Polyatomic Ion – negatively or positively charged group of atoms.
Ionic bond – bond in which one or more electrons are given by one atom to another.
Oxidation number – the positive or negative charge of a monatomic ion (for monatomic ions it is
the charge on the ion).
Polar covalent bond – a type of bond that forms when electrons are not shared equally due to
differences in electronegativity (in a 3D non-symmetrical molecule, the unequal sharing does
NOT cancel out, so that there is partial positive area and a partial negative area).
Non-polar covalent bond – a type of bond that forms when electrons are not shared equally
due to differences in electronegativity (in a 3D symmetrical molecule the unequal sharing cancels
out and the molecule is non-polar).
Mono- one
Di- Two
Tri- Three
Tetra- Four
Penta- Five
Hexa- Six
Hepta- Seven
Octa- Eight
Nona- Nine
Deca- Ten
Oxyanion – a polyatomic ion in which an element (usually a nonmetal) is bonded to one or more
oxygen atoms.
Nomeclature -- the devising or choosing of names for things.