Question

If an atom of nitrogen binds with three hydrogen atoms to form a molecule of ammonia, how many lone pairs of electrons does nitrogen have?
A.
one
B.
three
C.
four
D.
five

Answer 1

Hello,

Your question states: If an atom of nitrogen binds with three hydrogen atoms to form a molecule of ammonia, how many lone pairs of electrons does nitrogen have?

Your answer would be:

B. Three

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Hope this helps!

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~Rendorforestmusic

Answer 2

Answer:The correct answer is option A.

Explanation:

Nitrogen binds with 3 hydrogen atom to give ammonia .

$N_2+3H_2\rightarrow 2NH_3$

Electronic configuration of Nitrogen is given as:

$[N]=1s^22s^22p^3$

Nitrogen has 5 valence electrons and needs three electrons to complete its octet.

In ammonia molecule nitrogen atom accepts three electrons from each hydrogen atom.

Electron as lone pair = Valence electrons - Number of electrons in bonding

= 5 - 3 = 2 = 1 pair electrons as present as lone pair