Electronic Configurations-Quantum Numbers Which of the following statements abou

Question

Electronic Configurations-Quantum Numbers Which of the following statements about electronic configurations of atoms and mononuclear ions, and atomic orbital quantum numbers, are true or false. The magnetic quantum number is always an odd number. The electronic configuration of Cl^- is [Ne]3s^23p^6. For a given value of/the number of possible values of m_l is always an odd number. V^4+ has the same electronic configuration as K. The valence electronic configuration of bromine is 4s^24p^5. For cations of the first transition series the 3d orbitals are significantly lower in energy than the 4s. Whereas in the neutral atoms the 4s and 3d orbitals are close in energy.

Explanation / Answer

False, The magnetic quantum number is not always aodd number.

True, The electronic configuration of Cl- is [Ne] 3s2 3p6.

True, For a given value of l the number of possible values of mlis always an odd number.

True, as V vanadium electronic configuration is [Ar] 4s2 3d3. So, V4+ = [Ar] 4s1 because it looses 4 electrons. And , electronic configuration of K is [Ar] 4s1.

True, The electron configuration of Br is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5. The electrons with the highest quantum number are the 4s2 4p5 electrons. Thus, Br has seven valence electrons.

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