The electron arrangement for Na would be:
shell 1:2 electrons shell 2:8 electrons shell 3:1 electron

Question

Quizplus · Accepted Answer

Sodium (Na) has 11 electrons. The first shell can hold 2 electrons, the second shell can hold 8 electrons, and the third shell can hold up to 18 electrons. The electron arrangement for Na would be 2-8-1, meaning there are 2 electrons in the first shell, 8 electrons in the second shell, and 1 electron in the third shell.

The Electron Arrangement for Na Would Be