Question

the number of electron domains exists in the valence shell of the boron atom in the bcl₃ molecule is? 1 2 3 4 5

Explanation:

Step1: Identify valence electrons of B

Boron (B) has 3 valence electrons.

Step2: Determine bonding in BCl₃

In BCl₃, B forms 3 single bonds with Cl atoms, using all 3 valence electrons (no lone pairs left).

Step3: Count electron domains

Electron domains = number of bonding pairs + lone pairs = 3 + 0 = 3.

Answer:

3