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Images Dated 18th January 1995

Choose from 6 pictures in our Images Dated 18th January 1995 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.

Electron structure of helium atom Featured 18 Jan 1995 Image

Electron structure of helium atom

Electron density of a helium atom. This image represents the quantum cloud of electrons surrounding a helium atom. The colours represent the local electric charge density, essentially the probability that one might find one of the atom's four electrons at a given point. The colours run from blue (highest) to red (lowest). The chaotic appearance of the image is due to the presence of a nearby charged particle; when in equilibrium the atom would appear more symmetrical. This is a more appropriate image than the older ideas of fixed orbitals for electrons, sometimes referred to as the Bohr Model, and is due to the principles of modern quantum theory