Question

Which molecule/formula is ionic? FeO CH4 NO2 No answer text provided.

Which molecule/formula is ionic? FeO CH4 NO2 No answer text provided.

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Answer #1

FeO

Explanation

Generally, Compounds made by the combination of Metals and non metals are ionic, compounds made by the combination of non metals only are molecular

FeO: Fe is element and O is non metal

CH4: C is non metal and H is non metal

NO2 : N is non metal and O is non metal

From electronegativity point of view

Covalent bond : electronegativity difference between atoms is 0.0 to 0.4

Polar covalent bond : Electronegativity difference between atoms is 0.5 to 1.7

Ionic bond : Electronegativity difference between atoms is >/= 1.8

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