Question

The fluorine ion, F, has one more electron than a neutral fluorine atom.

a) How many pea-halves do you need?
b) Fill the sublevels in the correct order for the fluorine ion and write the electron configuration for the charged atom.​

Answer 1

a) three pea halves

b) Electron configuration of the fluorine ion 1s2 2s2 2p6

Step-by-step explanation:

The fluorine atom has seven electrons in its outermost shell and a total of nine electrons occupying three shells.

In the fluoride ion, the fluorine atom accepts one more electron to complete its outermost shell configuration (to have a filled shell as shown).

Hence the fluoride ion has 10 electrons with an electronic configuration of 1s2 2s2 2p6.