Answer : The Lewis-dot structure of phosphorus trihydride is shown below.
Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.
The valence electrons are represented by 'dot'.
The given molecule is, phosphorus trihydride
As we know that phosphorous has '5' valence electrons and hydrogen has '1' valence electron.
Therefore, the total number of valence electrons in phosphorus trihydride,
= 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 phosphorus trihydride is shown below.