Question

Explain why 'F' has only one covalency while 'Cl' can have covalencies 1,3 5 and 7​

Answer 1

ANSWER :

In 'F' due to the absence of vacant orbital in the valence shell of 7 it cannot expand its covalency and his covalency 1.

However, chlorine can expand its covalency is in its various excited state due to the presence of vacant 'd' orbital in the valence shell.

Answer 2

Answer:

F has only one covalency because there is absence of vacant orbital in the valence shell of 7 and it is unable to expand its covalency and its covalency is 1

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