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Q.

As applied to periodic table, which of the following sets include only magic number?

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a

2,8,18,32

b

8,8,18,18

c

2,8,8,18,18,32

d

2,18,18,32

answer is A.

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Detailed Solution

Magic Numbers: It has been discovered that when elements are placed in order of increasing atomic number, elements with comparable properties tend to recur at intervals of 2, 8, 18, or 32 elements.

2,8,8,18,18,32  sets include only magic number.

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