The Electron Configuration Video Lessons

Video Thumbnail

Concept:

Problem: Which of the following electron configurations is not allowed? a. 1s22s22p5b. 1s22s22p1 c. 1s22s5d. 1s22s22p63s2e. 1s22s22p2

FREE Expert Solution

Aufbau Principle → totally fill in the lowest energy orbital first
Hund’s Rule → electron orbitals that are degenerate (same energy) are first half-filled before they are totally filled  

s orbital → can hold a maximum of 2 electrons
p orbitals → can hold a maximum of 6 electrons
d orbitals → can hold a maximum of 10 electrons
f orbitals → can hold a maximum of 14 electrons

1s  → 2s  →  2p  →  3s →  3p


a. 1s22s22p5 

follows Aufbau Principle and Hund's Rule

orbitals contain less than or equal their maximum capacity

Electron configuration is allowed


b. 1s22s22p

follows Aufbau Principle and Hund's Rule

orbitals contain less than or equal their maximum capacity

Electron configuration is allowed

90% (355 ratings)
View Complete Written Solution
Problem Details

Which of the following electron configurations is not allowed? 

a. 1s22s22p5

b. 1s22s22p

c. 1s22s5

d. 1s22s22p63s2

e. 1s22s22p2

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the The Electron Configuration concept. You can view video lessons to learn The Electron Configuration. Or if you need more The Electron Configuration practice, you can also practice The Electron Configuration practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Herring's class at PSU.