How to Write Electron Configuration for Helium (He)
Helium (He) has atomic number 2 and mass number 4 .
Since the helium has two electrons around the nucleus of an atom .Therefore, helium electronic configuration is very simple and easy to write.
Electronic configuration of Helium (He) = 1s2
As we know that the K-shell has only one s-subshell .
s-subshell can accommodate a maximum of 2 electrons so the 2 electrons in helium atom fill in 1s subshell.
video: Electronic Configuration for Helium (He)
Due to two electrons in helium valence shell ,its duplet is complete .Therefore , He is stable and non-reactive (inert) . .
video :How to write electronic configuration of first 20 Elements
Read Now !!!
Also visit Digital Kemistry YouTube Channel for 3d Animated Best Chemistry Tutorials ( Urdu / Hindi)