Question

Nun is greater than that of
sodium and so on, that is, E, (H) > E, (Li) >
Ex(Na)>Ez(K).
2.6.4 Filling of Orbitals in Atom
The filling of electrons into the orbitals of
different atoms takes place according to the
aufbau principle which is based on the Pauli's
exclusion principle, the Hund's rule of
maximum multiplicity and the relative
energies of the orbitals.
Aufbau Principle
The word 'aufbau' in German means 'building​

Answer 1

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