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Atomic orbitals: sp^{3} hybrid electron densitySchematic plot of a sp^{3} electron density function. Blue represents negative values for the wave functions and red represents positive values. The "surface" of the orbital represents points for which the electron density for that orbital is the same  an isosurface. By choosing different values of electron density, denoted by the bar moving up and down on the line plot or by the moving plane on the surface plot, then the size of the threedimensional plot changes. The plot above is represents one of the four sp^{3} orbitals but the form of the others is similar, differing only in orientation. All values are of necessity not negative since the square of any real number cannot be less than zero.  

The Orbitron is a gallery of orbitals on the WWW The Orbitron^{TM}, a gallery of orbitals on the WWW, URL: http://winter.group.shef.ac.uk/orbitron/Copyright 20022015 Prof Mark Winter [The University of Sheffield]. All rights reserved. Document served: Sunday 16th February, 2020 