Oh! A good one. Note - This is going to be a long answer, questions in the comments are welcome. This will be for chromium, copper follows the same principle with miner differences. read more
This will be for chromium, copper follows the same principle with miner differences. First lets define the Aufbau principle (Source - Aufbau principle) 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). read more