Tag Archives: proton

10-to-minus15

There are many ways to look at 10-15.  This power of ten is: the scale of the atomic nucleus the length in meters of a proton and neutron the weight in kilograms of an E. coli bacterium the pressure in pascals of outer space between stars in the Milky Way the size or volume in [...]

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6 (.0221415)

Avogadro’s Number is 6.0221415 X 1023 which is also quantified as N A. “Avogadro’s number, N A , is the fundamental physical constant that links the macroscopic physical world of objects that we can see and feel with the submicroscopic, invisible world of atoms. In theory, N A specifies the exact number of atoms in [...]

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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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  • Countdown to Powers of Ten Day

    • 10/10/10 1288 days ago