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Problem: With what allotrope of oxygen is NO2- isoelectronic?

FREE Expert Solution

Step 1Nitrogen (EN = 3.0) is less electronegative than oxygen (EN = 3.5), so nitrogen  is the central atom.

Step 2NO2- has a –1 charge, which means it gained an electron. The total number of valence electrons present in the molecule is:

            Group             Valence Electrons

N            5A                   1 × 5 e =   5 e

O            6A                   2 × 6 e12 e

From  –1 charge:                   – 1 e

                Total: 18 valence e

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With what allotrope of oxygen is NO2- isoelectronic?

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