Nitrous acid HNO2 cannot be isolated as a pure compound. In the gas phase molecules of HNO2 are covalently bonded. In water it is a weak acid forming the nitrite ion however it readily disproportionates:-
3HNO2 -> H3O+ + NO3- + NO
HNO2 is a molecular compound. It consists of covalent bonds between the nitrogen, hydrogen, and oxygen atoms, rather than ionic bonds typically found in ionic compounds.
BO is a molecular compound because it is composed of nonmetals (boron and oxygen) and forms covalent bonds.
Cr is a transition metal element, specifically chromium. It is not considered ionic or molecular on its own.
H2O is a molecular compound.
Cr2O3 is an ionic compound. It consists of chromium ions (Cr3+) and oxide ions (O2-) held together by ionic bonds.
HNO2 is a molecular compound. It consists of covalent bonds between the nitrogen, hydrogen, and oxygen atoms, rather than ionic bonds typically found in ionic compounds.
HNO3 (nitric acid) is ionic.
Ionic Molecular
ionic
Molecular
molecular
PtO2 is ionic
ionic
ionic
it is ionic
It is molecular
NO2 is the polyatomic ionic compound nitrite Since it is bonded with hydrogen, this compound is an acid The correct name for HNO2, is therefore nitrous acid