KVPY SA Exam 2013 Question Paper

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Question : 35 of 80

Marks: +1, -0

The pair of atoms having the same number of neutrons is

${ _6 ↖{12}}C ,{ _12 ↖{24}}M g$
$_11↖{23}Na,_9↖{19}F$
$_11↖{23}Na,{ _12 ↖{24}}M g$
$_11↖{23}Na,{ _19 ↖{39}}K$

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