Question

Bond between Boron and Fluorine i.e. B - F bond is polar whereas BF is a neutral molecule . Explain how

don't scam.​

Answer 1

A covalent bond is a chemical bond involved the sharing of electronic pairs 2 Nonmetal atoms

Atoms share valence electron to achieve a full octet :8 valence electron just like the noble gases. Note most elements up to atomic number 20 follow the octet rule except for hydrogen, boron , Beryllium , and aluminium.

Answer 2

Answer:

Though the B−F bond in BF

3

is polar, but they arrange themselves in trigonal planar geometry and hence cancel out each other due to symmetry.Therefore, there is no net dipole moment.

Whereas in NH

3

, the shape of molecule is trigonal pyramidal with no symmetry, hence there is a net dipole moment.