Question

Two students made the Lewis dot diagrams of NH3. The diagrams are as shown.

Which student drew the correct Lewis dot diagram?

Only Student A
Only Student B
Both Student A and Student B
Neither Student A nor Student B

Answer 1

niether of them

Step-by-step explanation:

the rest are bs

Answer 2

Answer : The correct option is, Only Student B

Explanation :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is,
`NH_3`

As we know that nitrogen has '5' valence electrons and hydrogen has '1' valence electron.

Therefore, the total number of valence electrons in
`NH_3` = 5 + 3(1) = 8

According to Lewis-dot structure, there are 6 number of bonding electrons and 2 number of non-bonding electrons.

The Lewis dot structure of student A is wrong because there is a coordinate bond present between the nitrogen and hydrogen is not covalent.

The correct Lewis-dot structure of
`NH_3` is shown by the student B.