How many sublevels can exist in the 3rd energy level?

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t-nez | High School Teacher | (Level 3) Associate Educator

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This sounds like a question about electron energy levels. The third principal energy level has three sublevels, s,p and d.

This means that it can have a maximum of 18 electrons. Read on to learn why:

The sublevels possilbe for each principal energy level are as follows:

n=1: s

n=2: s and p

n=3: s, p and d

n=4 and higher: s, p, d and f

The sublevels have various numbers of orbitals, which are regions of probability of finding an electron, and each orbital can have a maximum of two electrons.

Here are the number of orbitals and maximum number of electrons possible for each sublevel:

s-sublevel = 1 orbital = 2 electrons

p-sublevel = 3 orbitals = 6 electrons

d-sublevel = 5 orbitals = 10 electrons

f-sublevel = 7 orbitals = 14 electrons