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Which of the following are the character...

Which of the following are the characteristic properties of group 16?

A

A. Group 16 elements are collectively known as chalcogens

B

B. All elements of group 16 exhibit allotropy and negative electron gain enthalpy `O gt S gt Se gt Te gt Po`

C

C. They have low I.E. values compared to group 15

D

D. All the above

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    B
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    D
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    C
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