In: Chemistry
Identify the atom whose electron configuration is [Ar]4s^23d^6. write the one or two letter symbol for the element. How many unpaired electrons are there in the ground state of this atom?
Total number of electrons in system [Ar]4s2 3d6
= [18] + 2 + 6 = 26
This atomic number belongs to Iron = [Fe]
Number of unpaired electrons in [Fe] in the ground state = 4, as number of electrons in 3d orbitals = 6