Encyclopedia

Ir

Ir, symbol for the element iridium.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved.

More on Ir from Fact Monster:

  • Internal Revenue Service - Internal Revenue Service Internal Revenue Service (IRS), division of the U.S. Treasury Dept. that ...
  • Bhutan's New Income Tax - Y2K Brings the IRS to Bhutan by Borgna Brunner Strongly traditional Bhutan, one of the world's ...
  • Ir-shemesh - Ir-shemesh Ir-shemesh , the same as Beth-shemesh 2.
  • Periodic Table of the Elements: Iridium - Periodic Table of the Elements: Iridium Atomic Number: 77 Atomic Symbol: Ir Iridium Atomic Weight: ...
  • infrared astronomy - infrared astronomy infrared astronomy, study of celestial objects by means of the infrared ...

See more Encyclopedia articles on: Compounds and Elements