It depends on whether you are talking about copper I or copper II. For copper I nitride the formula is 3Cu+ + N3- -> Cu3N. If it is copper II it is 3Cu2+ + Cu3N2
The chemical formula for copper oxide is CuO.
Osmium nitride chemical formula: OsN2 See also the link: https://digitallibrary.sissa.it/retrieve/1804/ProofMS_OsN2.pdf
Pb₃N₂
The chemical formula for table salt is NaCl.
The chemical formula for water is H20.
Ba(NO3)2
The chemical formula for copper oxide is CuO.
Osmium nitride chemical formula: OsN2 See also the link: https://digitallibrary.sissa.it/retrieve/1804/ProofMS_OsN2.pdf
Pb₃N₂
The chemical formula for table salt is NaCl.
The chemical formula for water is H20.
The chemical formula for barium fluoride is BaF2.
Formula: Ca3P2
The formula is CaSiO4.
The chemical symbol for copper is Cu from the Latin Cuprum.
For correction purposes the correct way to write this is H2O and it is the chemical formula for water.
copper (I) oxalate Always write formulas with lower case letters.