Which is a violation of hunds rule

Letters 35 , Katriel, J. Acta Berl. Jungen, M. Weissman, S. Memory, J. New York, McGraw-Hill: Kollmar, H. Huzinaga, S. Preprint, University of Alberta, Canada Moule, D. Herzberg, G. Princeton: Van Nostrand Huo, W. Gilles, A. Letters 25 , ; Masanet, J. Zetsch, C. Bunsenges, Phys. Try it now. Ab clear karein apne doubts Whatsapp par bhi.

Apna phone number register karein. Ab aap Whatsapp pe solutions paa saktey h, hum aapko message karenge. Ab aap Whatsapp pe solutions paa saktey h, hum aapko ping karenge. Study Materials. Question 2 You have no electrons in the "2s" orbital, which is between the "1s" and "2p" levels. Question 3 You have two electrons in one "2p" orbital, but none in the other "2p" orbitals. Question 4 The electrons in the half-filled "4d" orbitals don't all have the same spin. Question 5 You filled the "4d" orbitals before you filled the "4p" orbitals, which are lower in energy.

This violates the Aufbau Principle. Related questions How do electron configurations in the same group compare? How do the electron configurations of transition metals differ from those of other elements? Consider the electron configuration for carbon atoms: 1s 2 2s 2 2p 2 : The two 2s electrons will occupy the same orbital, whereas the two 2p electrons will be in different orbital and aligned the same direction in accordance with Hund's rule.

Consider also the electron configuration of oxygen. Oxygen has 8 electrons. The electron configuration can be written as 1s 2 2s 2 2p 4. To draw the orbital diagram, begin with the following observations: the first two electrons will pair up in the 1s orbital; the next two electrons will pair up in the 2s orbital.

That leaves 4 electrons, which must be placed in the 2p orbitals. Therefore, two p orbital get one electron and one will have two electrons. Hund's rule also stipulates that all of the unpaired electrons must have the same spin. In keeping with convention, the unpaired electrons are drawn as "spin-up", which gives Figure 1. When atoms come into contact with one another, it is the outermost electrons of these atoms, or valence shell, that will interact first.