a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)
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Examples of atomic number 2
atomic number 2
This week's element is erbium, which has the symbol Er and the atomic number 68.
From the guardian.co.uk
The second-lightest radioactive element, promethium, has an atomic number of 61.
From the en.wikipedia.org
Curium is a synthetic chemical element with the symbol Cm and atomic number 96.
From the en.wikipedia.org
On the periodic table, it is represented by the symbol Es and atomic number 99.
From the en.wikipedia.org
The largest atomic number so far created is 118, also at the Dubna accelerator.
From the post-gazette.com
The heaviest known naturally occurring element is uranium, with atomic number 92.
From the newscientist.com
Beta decay either increases or decreases the atomic number of the nucleus by one.
From the en.wikipedia.org
Actinides are the elements above atomic number 89 and are usually radioactive.
From the sciencedaily.com
Lists of the elements by name, by symbol, and by atomic number are also available.
From the en.wikipedia.org
