Question

f-express your answer in complete form, in order of increasing orbital. for example, $1s^{2}2s^{2}$ would be entered as 1s^22s^2.

Explanation:

Step1: Determine the atomic number of F

Fluorine (F) has an atomic number of 9. The \(F^-\) ion has one more electron than the neutral F atom, so it has 10 electrons.

Step2: Write the electron - configuration

The electron - configuration of an atom/ion is written based on the Aufbau principle (filling orbitals in order of increasing energy: \(1s<2s < 2p<3s<3p<4s<3d\cdots\)).
For 10 electrons:

• The \(1s\) orbital can hold 2 electrons: \(1s^{2}\)
• The \(2s\) orbital can hold 2 electrons: \(2s^{2}\)
• The \(2p\) orbital can hold 6 electrons: \(2p^{6}\)

Answer:

\(1s^{\wedge}22s^{\wedge}22p^{\wedge}6\)