Question

write the complete ground - state electron configuration of f⁻. for multi - digit superscripts or coefficients, use each number in succession.

Explanation:

Step1: Determine the atomic number of F

The atomic number of F (fluorine) is 9.

Step2: Consider the charge of \(F^-\)

Since \(F^-\) has a charge of -1, it has one more electron than the neutral F atom. So the number of electrons in \(F^-\) is \(9 + 1=10\).

Step3: Write the electron configuration

Using the Aufbau principle (filling electrons in order of increasing energy levels: \(1s<2s < 2p\)), for \(n = 1\), the \(1s\) sub - shell can hold 2 electrons (\(1s^2\)). For \(n=2\), the \(2s\) sub - shell can hold 2 electrons (\(2s^2\)) and the \(2p\) sub - shell can hold 6 electrons (\(2p^6\)).

Answer:

\(1s^22s^22p^6\)