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Which of the following elements can show...

Which of the following elements can show covalency greater than 4?

A

Be

B

P

C

S

D

B

Text Solution

Verified by Experts

The correct Answer is:
B, C
Elements Be and B lie in the 2nd perioc. They can have a maximum of 8 electronic in the valence shell In other words they can have a maximum covalency of `8//2` = 4. However elements P and S have vacant d- orbital in their respective valence shells and hence can accommodate more than 8 electrons in their respective valencel shells. In other words they can show a covalency of more than 4. Thus , options ( b) and ( c) are correct.
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