The Sblock Elements Ques 36
36. Which of the following atoms will have the smallest size?
[1989]
(a) $Mg$
(c) $Be$
(b) $Na$
(d) $Li$
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Answer:
Correct Answer: 36.(c)
Solution:
(c) Within a period, the atomic size decreases from left to right.Further atomic size increases down the group. Hence the correct order is
$ \text{ i.e. } Na>Mg>Li>Be \text{. } $