Question

The lewis structure of ash3 shows __________ nonbonding electron pair(s) on as.

Answer 1

There are 2 non bonding electrons on As, or 1 non bonding electron pair! There are 3 bonding pairs, or 6 non bonding electrons

Answer 2

Answer :

The Lewis structure of $AsH_3$ shows 1 non-bonding electron pair on as.

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, $AsH_3$

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

Therefore, the total number of valence electrons in $AsH_3$ = 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 $AsH_3$ is shown below.