According to the periodic table, how many electron shells do the elements in the third row have?
A) 1
B) 2
C) 3
D) 4
E) It depends on the specific element.

Question

Quizplus · Accepted Answer

Elements in the same row on the periodic table have the same number of electron shells. Therefore, all of the elements in the third row, including sodium (Na), magnesium (Mg), aluminum (Al), silicon (Si), phosphorus (P), sulfur (S), chlorine (Cl), and argon (Ar), have 3 electron shells.

According to the Periodic Table, How Many Electron Shells Do