Tom Skerritt. Biography: Tom Skerritt is probably the best-known actor whose name is never remembered. A rugged outdoors type, Skerritt briefly attended Wayne State University and UCLA before making his film bow in [[Feature~V115961~War Hunt~warhunt]] (1962). His...
The chemical formula for oxygen is O2 and for individual oxygen  atom its symbol is O.   Gases such as oxygen exist as diatomic molecules.
Permalink Submitted by spock on Wed, 2009-03-25 22:31. The rule for Oxygen is that it is almost alway -2 in a compound. The sum of the oxidation states in an ion must add up to the charge on the ion, Therefore each Cr atom must have a +6 oxidation state: 2(+6) + 7 (-2) = -2.