Question

Which is the correct electron configuration for sodium (Na)?

A. 1s22s22p62d1
B. 1s22s22p63s1
C. 1s22p63d3

Answer 1

The answer for this question is B.

Answer 2

Answer:
`1s^22s^22p^63s^1`

Step-by-step explanation:

Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom.

The electrons are filled according to Afbau's rule in order of increasing energies.

Total number of electrons of sodium are 11 as the atomic number of sodium is 11. The electronic configuration of sodium will be represented as:

`[Na]:11:1s^22s^22p^63s^1`