# How many electrons can each shell in an atom hold?

I know that the first shell can hold up to 2, the second and third can hold up to 8, and the fourth 18. But what about after that?

• Remember that search engines are a powerful tool. Searching for electrons per shell in Google yields the following section on Wikipedia among the first results. – Nicolau Saker Neto Jan 3 '14 at 2:39
• @KarstenTheis you're right. I was improving a suggested edit and must have had a mental lapse. – A.K. Nov 9 '19 at 19:13

$$\text{Electron Capacity for a shell} = 2n^2$$