How many electrons at the external energy level does an iron atom have?

In the periodic system:
– the serial number is equal to the nuclear charge and the number of electrons;
– the number of the period is equal to the number of energy levels;
– the group number shows the number of electrons in the last level.
Iron (Fe) – No. 26, located in the 4th period and 8th group. But, for elements of odd rows of large periods, starting from element 3, the completion of the last level is temporarily stopped and the penultimate level is filled, and 2 electrons remain on the outer one. This means that the iron atom also has 2.

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