Which of the following sequence contain atomic number of only representative elements?

21, 39, 81, 82

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25, 31, 82, 83

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11, 12, 16, 32

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71, 79, 80, 81

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Solution

The correct option is C $11, 12, 16, 32$
$11, 12, 16, 32$
Since $11$ & $12$ belongs to $s -$ block and $16$ & $32$ belongs to $p -$ block.
$s$ and $p$ block element are called representative element.

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Elements have been arranged in the following sequence on the basis of their increasing atomic masses.

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Which of the following sequence contain atomic number of only representative elements?

The correct option is C 11,12,16,3211,12,16,32Since 11 & 12 belongs to s− block and 16 & 32 belongs to p− block.s and p block element are called representative element.

The correct option is C $11, 12, 16, 32$
$11, 12, 16, 32$
Since $11$ & $12$ belongs to $s -$ block and $16$ & $32$ belongs to $p -$ block.
$s$ and $p$ block element are called representative element.