Saturday, June 2, 2018

physical chemistry - What are the maximum number of electrons in each shell?


In my textbook, it says that the maximum number of electrons that can fit in any given shell is given by 2n². This would mean 2 electrons could fit in the first shell, 8 could fit in the second shell, 18 in the third shell, and 32 in the fourth shell.


However, I was previously taught that the maximum number of electrons in the first orbital is 2, 8 in the second orbital, 8 in the third shell, 18 in the fourth orbital, 18 in the fifth orbital, 32 in the sixth orbital. I am fairly sure that orbitals and shells are the same thing.


Which of these two methods is correct and should be used to find the number of electrons in an orbital?


I am in high school so please try to simplify your answer and use fairly basic terms.




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