1.

Which element comes in 5th period of chalcogen group ?

Answer»

Se
Te
Sb
AR

Solution :Group 16 ELEMENTS are known as .Chalcogens.
`to (A)` Se and (B) Te are chalcogens
`Se : (Ar) 3d^(10) 4s^(2) 4p^(4), therefore 4th` PERIOD
`Te : (Kr) 4d^(10) 5s^(2) 5P^(4), therefore 5^(th)` period.


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