Q. 95.0( 2 Votes )
Out of the three elements Ca, Mg. Sr which one will have atom of biggest size?
Ca, Mg and Sr all three belong to the same group and are present in the order Mg < Ca < Sr. The atomic size increases on moving down the group. This is because of the increase in number of shells due to which the distance between the outermost electron and the nucleus increases. Thus Sr will have atoms of biggest size.
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