Question

(21) How many valence electrons are in the sulphite ion? Ego 7888 (22) The following Lewis structure of acetic acid is incomplete because it does not show the lone! pairs K Draw the lone pairs on the diagram How many lone pairs of electrons should there be in the Lewis structure? شما هم وم (23) (1) 127 The central atom in the iodite son 10 is sur 1 single bond, 1 double bond and 2 fone pairs of ele 3 bonding pairs and 1 unshared paw of Bedrons 1 bonding pair and 3 unshared pairs of elections 2 double bonds and no unshared pairs of elections 4 bonding pairs and 4 lone pairs of elections

would u please assist me with these questions.

Answer 1

Valance electrons are the electrons present in the outermost orbital of an atom

(21) Valance electrons of Sulphite ion

The number of valence electrons for molecules can be calculated by adding the valence electrons of all the atoms

lewis structure of sulphite ion exists in three different resonance forms

sulfur and oxygen comes in the same group hence the valance electrons of sulfur and oxygen both are 6

Hence the valance electrons of sulfite ion is

6+6+6+6 - (-2) = 26,

-2 comes from two negative charges

Hence the answer is option [3]

(22)

each oxygen will have two pair of lone pairs. Acetic acid (given molecule) having two oxygen hence total four lone pair is present

:o: HH H .. но HO н Lewis structure without lone pair Lewis structure with lone pair

Hence the answer is option [3]

(23)

Iodite ion is known as IO₂^-

^{The structure is}

io

We can see that central iodine is surrounded by a single bond, a double bond and two lone pair

Hence the answer is option [1]

Please let me know if you have any more doubts