Which molecule could have an expanded octet? hno2 h2co3 h3po4?

 is the molecule that can have an expanded octet.

Octet Expansion:

It means that the molecule or atom needs more electron than they require in octet rule.

has 32 valence electrons in its outermost shell instead of 8 valance electrons.

Therefore, is the molecule that have expanded octet.

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n has four pairs of electrons in the valence shell, electrons repel one another ,n has 7 protons in its nucleus, and since n has 7 protons, it must fill the second shell, giving it 4 pairs of electrons. the electrons form 3 bonds and 1 lone pair of electrons. each pair of electrons repels the other pairs, so they are equally far apart.

so all of the above

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