[bast]

Could anyone tell me how to make the electron configuration using this method (please see image below)?



Please show me an example, where the element is Ca, 20 electrons.

[Borek]

I don't see a "method" in your image, just a symbol that looks like an orbital with two electrons of opposite spins, identical with one of our symbols: 

[bast]

I don't see a "method" in your image, just a symbol that looks like an orbital with two electrons of opposite spins, identical with one of our symbols: 

It's weird if an administrator like you don't understand what I'm asking about. 

It's called a Hund's rule.

[Borek]

Rule is a rule, it is not a method.

The symbol you used - while can be used in the context of the Hund's rule - is not its equivalent.

I can only guess you are asking for an application of the Hund's rule to determine the electron configuration of the calcium metal. However, Hund's rule is not applicable here.

[Ciubba]

I think he's just asking how to do orbital notation.