1. Which of the following orbital diagrams violates the Pauli exclusion principl

Question

1. Which of the following orbital diagrams violates the Pauli exclusion principle?

A.

B.

C.

D.

E.

Which of the following have one or more filled d subshells in their ground state electron configuration?

A.Al

B.Si

C.Mn

D.Ga

E.Sc

3. The ground-state electron configuration of a Mn^2+ ion is 1s^2 2s^2 2p^6 3s^2 3p^6 3d^5 . Therefore, Mn^2+ is:

A.paramagnetic with one unpaired electron.

B.paramagnetic with three unpaired electrons.

C.paramagnetic with five unpaired electrons.

D.paramagnetic with two unpaired electrons.

E.diamagnetic.

4. Which of the following properties, in general, increases from left to right across a period in the periodic table?

A.Metallic character

B.Ionization energy

C.Density

D.Ionic charge

E.Atomic radius

Explanation / Answer

1) answer option D

because according to Pauli exclusion principle no two electrons should have all four quantum numbers same. but here in p orbital hwo electronds having same quantum numbers

2) answer is option D

Ar 3d10 4s2 4p1 (Ga configuration)

3) answer is option C .paramagnetic with five unpaired electrons

4) answer is option B     Ionization energy

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