Express your answer as a chemical symbol.

Question

has five electrons in the  3p sublevel

has three 2p electrons

completes the 3s sublevel

has one electron in the 3s sublevel

Answer 1

Hey Anya!

To do this problem, we have to do electron configurations. For example, the element with 5 electrons in the 3p sublevel would have an electron configuration 3s2 3p5. Looking at the right side of the periodic table that contains the p-block, we look in the third row for the element with configuration 3s2 3p5, which would be Cl. Following this same methodology for the other questions we get:

Has three 2p electrons: N

Completes 3s sublevel: Mg

Has one electron in 3s sublevel: Na

Hope this helps!