O2- is the oxide ion.
The chemical name of PtO2 is platinum oxide.
The correct chemical name for N2O5 is dinitrogen pentoxide.
O-hydroxy benzoic acid or 2-hydroxy benzoic acid.
um, oxygen? The name of the element is the name of... the element. If, i.e., the species you wish to describe is a single atom of neutral oxygen, then it is preferable to call it monatomic oxygen or something for clarity.
The symbol is O, and the charge is negative 2
The chemical name for C2O4 with a charge of -2 is Oxalate.
Mg(NO3)2 {note correct case for "O"} is not an element at all. Instead it is a compound of three elements, magnesium, nitrogen, and oxygen.
Hydrogen peroxide is represented by the compound formula H2O2 , though its chemical name is just: hydrogen peroxide. (not 'perIoxide')
The chemical name for sodium is Na and for oxygen is O. When combined, they form sodium oxide (Na2O).
Tay-o's rat's name is Pip-La-2-2-&-Tay-O-
This is the chemical formula for strontium hydroxide.
The chemical name of Ca(NO3)2 is "Calcium Nitrate".