Question

Please help

Which of the following lists contains elements with seven electrons in their outermost energy levels?


He, Ne, and Ar

Cr, Mn, and Fe

Br, I, and Cl

O, S, and Se

Answer 1

there are none with seven in the outermost shell, but the ones with eight would be a) He, Ne, and Ar

Answer 2

A)He, Ne, and Ar

Step-by-step explanation:

I believe its this one. Sorry if its wrong. Remember that 8 electrons are in the outermost energy level .