Question

Which rule is used to arrange the electrons in each shells of atom?

Answer 1

Answer:

The filling of the shells and subshells with electrons proceeds from subshells of lower energy to subshells of higher energy. This follows the n + ℓ rule which is also commonly known as the Madelung rule. Subshells with a lower n + ℓ value are filled before those with higher n + ℓ values.

Answer 2

Answer:

A Madelung rule

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