An element X belongs to group 16 and 5^{th} p | vedclass

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(C) The $5^{th}$ period starts after the $4^{th}$ noble gas,which is Krypton ($Kr$,$Z=36$).Group $16$ elements in the $5^{th}$ period follow the confi

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$52$

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(C) The $5^{th}$ period starts after the $4^{th}$ noble gas,which is Krypton ($Kr$,$Z=36$).Group $16$ elements in the $5^{th}$ period follow the configuration of the noble gas $Kr$ $([Kr] 4d^{10} 5s^2 5p^4)$.The atomic number is calculated as $36 (Kr) + 2 (5s^2) + 10 (4d^{10}) + 4 (5p^4) = 52$.Thus,the element is Tellurium $(Te)$ with atomic number $52$.

An element $X$ belongs to group $16$ and $5^{th}$ period. Its atomic number is

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