Homework help with electrons and shells?

How many shells are needed for each of the following?



1. How many shells do 2 electrons need?



2. 4 electrons need ________ shells.



3. 10 electrons need _______ shells.



4. 16 electrons need ________ shells.



5. 20 electrons need _______ shells.

Homework help with electrons and shells?
1. How many shells do 2 electrons need? 1



2. 4 electrons need ________ shells. 2





3. 10 electrons need _______ shells. 2



4. 16 electrons need ________ shells. 3



5. 20 electrons need _______ shells. 4
Reply:1...1.

2...2.

3...2.

4...3.

5...3.

After shell 2, there are some variations in electron distribution.