Answer:
2,8,1
Explanation:
The atomic number of sodium is 11.
So first u have to remember somethings.
I assume that u r in 9th, sir.
So I'll explain some basic things.
While arranging the electronic configuration, in the first shell there can only be a maximum of 2 electrons.
In the second shell there can only be max of 8 electrons.
In the third there can only be a max of 18.
U just have to remember this.
So now u just have to arrange the atomic number of an element, in this case sodium into what I said.
First 2,then 8.
Now wait. Check how many electrons u have covered, till now u have covered 10 electrons.
U need to arrange one more.
So it's 2,8,1
I hope this satisfies you.
If u have any further questions please let me know.
I hope u will make this the brainliest answer and follow me.
With best wishes, joel
