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CBSE Class 9 Science Question 18 of 34

Structure of the Atom — Question 18

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18
Question

Question 18

Which one of the following is a correct electronic configuration of Sodium?

  1. 2, 8
  2. 8, 2, 1
  3. 2, 1, 8
  4. 2, 8, 1
Answer

2, 8, 1

Reason — Sodium has atomic number 11 and it's electronic configuration is 2,8,1.