irs play an important role in de pairs play an important role in determining the

Question

irs play an important role in de pairs play an important role in determining the chemical and compounds. Thus, it is important to know which atoms carry unshared pairs. Use the structural formulas below to determine the number of unshared pairs at each designated atom. Be sure your answers are consistent with the formal charges on the formulas The number of unshared pairs at atom a is D CH F B-F The number of unshared pairs at atom b H3C CH The number of unshared pairs at atom c is The number of unshared pairs at atom a is D HC CH HC C ea The number of unshared pairs at atom b is N c The number of unshared pairs at atom c is Submit Answer Retry Entire Group 7 more group attempts remaining

Explanation / Answer

The electronic configuration B-5:

1s2 2s2 2p1

B has total 3 valance electrons B forms three bonds with F and it has form one more bond with F by co-ordination bond. There are no unshared e-

The electronic configuration F-9:

1s2 2s2 2p5

F has total 7 valance electrons and F forms one bond and it has three pair of lone pair of electrons or unshared electrons.

The electronic configuration O-8:

1s2 2s2 2p4

O has total 6 valance electrons and O forms three bonds.

But here O has positive charge means it give this lone pair of electrons hence there is only one lone pair of e-

The electronic configuration Cl-17:

1s2 2s2 2p6 3s2 3p5

Cl has total 7 valance electrons and Cl forms one bond and it has three pair of lone pair of electrons or unshared electrons.

The electronic configuration C-6:

1s2 2s2 2p2

C has total 4 valance electrons and C forms four bonds and it has none pair of lone pair of electrons .

1s2 2s2 2p3

N has total 5 valance electrons N forms three bonds and it has one pair of lone pair of electrons .

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