Question

How many electrons are in the highest occupied energy level of these atoms?

Na(sodium)
Al (aluminum)
F(fluorine)
C(carbon)

Answer 1

Look at the periodic table. Na is in group 1, Al in 13, F in 17 and C in 14 or if your prof is using another system (common) Na is in IA, Al in IIIA, F in VIIA, and C in IVA