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Title: Sodium Alternative
Description: Sodium-like tungsten ions (blue) are far smaller than neutral sodium atoms (orange)the ion's 11 electrons are pulled in very tightly by the 74 protons in the tungsten nucleus, making their energy jumps far more expensive than in neutral sodium and causing them to emit high-energy ultraviolet wavelengths of light, rather than visible light, as is the case with ordinary sodium.

*Physics
Subjects (names):
Topics/Categories: Physics--Atomic and Molecular Physics
Type: Graphic/illustration
Source: National Institute of Standards and Technology
Credit Line as it should
appear in print:
Credit: NIST
AV Number: 09PHY018
Date Created: 2009
Date Entered: 9/8/2009

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