wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Identify the electronic configuration of argon atom from the following.

A
1s2 2s2 3p6 3s2 4p6
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
1s2 2s2 2p6 3s2 3p6
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
1s2 2s2 2p6 3s2 4p6
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
1s2 2s2 2p4 3s2 3p6
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 1s2 2s2 2p6 3s2 3p6
Atomic number of argon (Ar) is 18.
The electrons are filled in the orbitals according to the Aufbau principle. It states that filling of electrons takes place in increasing order of energy.
The energy increases with increasing value of n + l.Orbital1s2s2p3s3pn+l value12334
For subshells with the same value of n + l electrons are assigned first to the sub shell with lower n.

Since, 18 electrons are present in argon, the electronic configuration is given by-
1s2 2s2 2p6 3s2 3p6 .

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Electronic Configuration
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon