Question

valwncy of phosphorus in PCl3​

Answer 1

here is ur answer

the valency is 3 or5

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Answer 2

Covalent Compounds: Compounds formed by sharing of electrons.

PCl3 is a covalent Compound.

Valency of Phosphorus is 3.

Number of Electrons in outermost shell of Phosphorus is 5.

When Number of electrons in outermost shell is greater than 4 then,

Valency = 8 - Number of electrons in outermost shell

Valency of Phosphorus = 8 - 5 = 3

• There are 5 electrons in the outermost shell of Phosphorus and 7 electrons in outermost shell of chlorine.
• Phosphorus (P) shares three electrons with 3 atoms of Chlorine (Cl) and its remaining 2 electrons form 1 lone pair.
• Each Chlorine (Cl) shares 1 electron with Phosphorus (P).