Question

In which molecule does the central atom have one lone pair of valence electrons? a. IF5...

In which molecule does the central atom have one lone pair of valence electrons?

a. IF5

b. PF5

c. SiF4

d. BF3

e. OF2

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Homework Answers

Answer #1

a)

number of valence electrons in I = 7

5 are used in bonding

So,

number of electrons remaining with I = 2

which is 1 lone pair

b)

number of valence electrons in P = 5

5 are used in bonding

So,

number of electrons remaining with P = 0

c)

number of valence electrons in Si = 4

4 are used in bonding

So,

number of electrons remaining with Si = 0

d)

number of valence electrons in B = 3

3 are used in bonding

So,

number of electrons remaining with B = 0

e)

number of valence electrons in O = 6

2 are used in bonding

So,

number of electrons remaining with I = 4

which is 2 lone pair

Answer: a

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