The smallest atom ever



WORLD'S SMALLEST ATOM
THE LONGEST LIST OF THE LONGEST STUFF AT THE LONGEST DOMAIN NAME AT LONG LAST

What is the world's smallest atom?


We took chemistry and can confidently say the world's smallest atom is the hydrogen atom with only 1 proton and one electron, but as we soon found out, thanks to one of our visitors, we were wrong.

The hydrogen atom is 1 Angstrom, or 10-8 centimeters in diameter and has an atomic weight of 1.00794 and as far as atomic weight goes is definitely the smallest, but.....

Even though helium is four times heavier than hydrogen the second electron fills the "1s" shell and results in a slightly more compact atom. The diameter of the helium atom is 0.98 Angstroms making it the world's smallest atom.

Hydrogen Helium


The smallest atom ever

The smallest atom ever

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