Representations of Orbitals

Representations of Orbitals - which represents 90% of the...

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Representations of Orbitals The s Orbitals The 1s orbital is spherically symmetrical. A plot of ψ 2 versus distance (r) from the nucleus shows a dramatic reduction in probability of finding the electron very far from the nucleus: This indicates that in the ground state the electrostatic attraction of the electron for the proton in the nucleus is such that the electron is unlikely to be found far from the nucleus. The higher energy s orbitals are also spherically symmetrical, however, they exhibit distinct nodes in the distribution probability:
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In the higher s orbitals there exists node regions where the electron density approaches zero (2s has 1 node, 3s has 2 nodes, etc) The higher s orbitals (excited states) have electron density distributions which indicate that there is a higher probability of finding the electron further away from the nucleus The size of the orbital increases as n increases The most widely used representation of the Schrödinger orbits is to draw a boundary
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Unformatted text preview: which represents 90% of the total electron density distribution. For the s orbitals this would be a sphere representation . p Orbitals The p orbitals are 'dumbbell' shaped orbitals of electron density, with a node at the nucleus. There are three distinct p orbitals, they differ in their orientations There is no fixed correlation between the three orientations and the three magnetic quantum numbers ( m l ) The d and f orbitals In the third shell and beyond there are five d orbitals, each has a different orientation in space: Although the 3d z 2 orbital looks different, it has the same energy as the other d orbitals. There are 7 equivalent f orbitals (for each value of n 4 or greater). They are pretty difficult to represent on a 3-d contour diagram. Understanding orbital shapes is key to understanding the molecules formed by combining atoms...
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This note was uploaded on 11/22/2011 for the course CHEMISTRY CHM1025 taught by Professor Laurachoudry during the Fall '10 term at Broward College.

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Representations of Orbitals - which represents 90% of the...

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