Q.

Which of the following represents the electronic configuration of an element with atomic number 17

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a

1s22s22p63s13p6

b

1s22s22p63s23p44s1

c

1s22s22p63s23p5

d

1s22s22p63s13p44s2

answer is C.

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Detailed Solution

Atomic no. 17 is of chlorine.
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Which of the following represents the electronic configuration of an element with atomic number 17