Tag Archives: electron

The Shortest Time Interval Ever Measured

According to The Times of India, in 2010 a group of German physicists claimed “to have measured the shortest-ever time interval by discovering the tiniest duration an electron takes to leave the atom.” The scientists found that “when light is absorbed by atoms, the electrons become excited and get ejected from the atom if the [...]

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9 (.10956)

Electron rest mass from Table of Physical constants “The electron rest mass, symbolized m e , is the mass of an electron as measured when its speed is zero relative to an observer. The electron has extremely small mass  – it’s almost 2000 times less massive than the proton — at approximately 9.10956 x 10 [...]

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(Atomic number) 29 (Copper – Cu)

The name copper is derived from Latin word cuprium which refers to island of Cyprus where ore deposits were found thousands of years ago.  Common uses include coins, sculpture and conductor of electricity. Melting point     1083 Celsius Boiling point      2567 Celsius Copper has 29 electrons and 29 protons.  “In nature it has two isotopes, 63 [...]

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73 (in Ham Radio)

According to ARRL (National Association of Amateur Radio), 73 is known as a “friendly word between operators”.  Because Ham Radio (also known as Amateur Radio) is wireless, the operators are more than just enthusiasts. At local levels (10+3), they offer vital assistance during disasters.  “For instance, it was the Amateur Radio Service which kept New [...]

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  • Countdown to Powers of Ten Day

    • 10/10/10 1387 days ago