First slide

Atomic and physical properties

Question

Which of the following is not an ionic trihalide?

Easy

A

AlF₃
B

BF₃
C

InF₃
D

GaF₃

Solution

B always forms covalent compounds by sharing its valency electrons.
Reasons : Due to its small size and high sum of first three ionisation energies, does not lose its three valency electrons to form B⁺³ ion .Therefore,it doesnot form ionic compounds.

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