Which orbital notation represents the second principal energy level of a silicon atom in the ground state?

2

Explanation:

Silicon is one the elements found in nature and well positioned the periodic table.

It has an atomic number of 14 with an electronic configuration:

       1s² 2s² 2p⁶ 3s² 3p⁴

From this formula the orbital notation that represents the second principal energy level is 2.

The main energy level in which the orbital is located or the average distance of the orbital from the nucleus is the principal  quantum number.

It takes the number 1,2,3,4,5 e.t.c

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.