Question

Explain the rule according to which electrons are filled in various energy levels

Answer 1

Answer:Aufbau principle

Explanation:The Aufbau principle states that, hypothetically, electrons orbiting one or more atoms fill the lowest available energy levels before filling higher levels (e.g., 1s before 2s). In this way, the electrons of an atom, molecule, or ion harmonize into the most stable electron configuration possible

Answer 2

Answer:

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