Q.

Which one of the following configuration represents a noble gas

Moderate

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By Expert Faculty of Sri Chaitanya

a

1s22s22p6 3s2

b

4s

c

1s2 2s22p6

d

1s22s22p6 3s23p6 4s2

answer is 3.

(Detailed Solution Below)

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Detailed Solution

1s2 2s22p6 represents a noble gas electronic configuration.
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