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

1.	Which of the following elements can show covalency greater than 4 ?
Answer» Be P S B Solution :Elements Be and B are from the 2nd period. They can have 8 ELECTRONS maximum in the valence shell. In other words, we can SAY that it can have a maximum covalency of 8/2 = 4. Elements P and S have vacant d- orbitals in their respective valence shells and hence it can accommodate more than 8 electrons in their valence shell RESPECTIVELY. In other words, we can say that it can SHOW a covalency of more than 4.

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