electron configuration

Question 1

equires that the electrons occupy the lowest possible energy level before filling up the next.

Answer 1

aufbau principle

Question 2

states that no two electrons can have the same set of four quantum number; the spin quantum number limits the number of electrons in an orbital to a maximum of two.

Answer 2

Pauli’s Exclusion Principle

Question 3

requires that the electrons fill the orbitals in a sub level, one by one, before pairing the electrons in an orbital spin in opposite direction.

Answer 3

hunds rule