Question

The element fluorine has 9 electrons. Which is the electron configuration for an atom of fluorine?

Answer 1

Answer: It is 1s2 2s2 2p2

Explanation:

The ones on the S (sunny side) have 2 arrows going the opposite directions, and the ones on the P (pink side) have arrows going opposite directions also except the one being left out on 2p. I hope this helps and I tried my best explaining the process of it.

Answer 2

Answer: Option (b) is the correct answer.

Explanation:

As the atomic number of fluorine is 9. This means that there are 9 protons present in an atom of fluorine.

This is because atomic number is the number sum of total nmber of protons present in an atom.

As in a neutral atom, the number of protons is equal to the number of electrons.  Since,there are 9 electrons present in given fluorine atom.

Hence, electronic configuration of this fluorine atom is as follows.

                  $1s^{2}2s^{2}2p^{5}$