Hund's Rule, Pauli Exclusion Principle, and the Aufbau Principle - Practice Questions & MCQ

Which of the following is correct order of filling of electrons in a species having more than one electron

Which of the following sets violate Pauli's exclusion principle :

Which of the following sets violate the Hund's rule

Element with electronic configuration $1 s^2, 2 s^2, 2 p^6, 3 s^2 3 p^6 3 d^{10}, 4 s^2 4 p^6 4 d^{10}, 5 s^2 5 p^3$ belongs to which group of the periodic table?

General electronic configuration of outermost and penultimate shell of an atom is $(n-1) s^2 \quad(n-1) p^6(n-1) d^x n s^2$. If n=4 and n=5, the number of protons in the nucleus is 

The incorrect order of energy of following orbitals is

Which of the following options does not represent ground state electronic configuration of an atom?

If the Aufbau principle is not followed, the first three quantum numbers (n, l and m) for the valence electron of K atom may take value

The statement that is not correct for periodic classification of elements is:

An element R forms the highest oxide $R_2O_5$ . R belong to