Question

When is the spin of an electron changing?

Answer 1

Simple .....
spin of electron changes when pairing of electron starts......
example: for hydrogen...
electronic configuration is 1s1
hence its spin is clock wise and value is +1/2
.
where as for helium...
electronic configuration is 1s2
pairing takes place ..so spin is anti clock wise and value is -1/2
.
hope this helps you.
.
keep smiling
.
mark this as brainliest answer