Definition of Atomic number 2

1. Noun. 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).

Exact synonyms: He, Helium
Generic synonyms: Chemical Element, Element, Argonon, Inert Gas, Noble Gas

Lexicographical Neighbors of Atomic Number 2

atomic number 102
atomic number 103
atomic number 104
atomic number 105
atomic number 106
atomic number 107
atomic number 11
atomic number 12
atomic number 13
atomic number 14
atomic number 15
atomic number 16
atomic number 17
atomic number 18
atomic number 19
atomic number 2 (current term)
atomic number 20
atomic number 21
atomic number 22
atomic number 23
atomic number 24
atomic number 25
atomic number 26
atomic number 27
atomic number 28
atomic number 29
atomic number 3
atomic number 30
atomic number 31
atomic number 32

Literary usage of Atomic number 2

Below you will find example usage of this term as found in modern and/or classical literature:

1. Science by American Association for the Advancement of Science (1917)
"It is true that between helium, atomic number 2 and sodium, atomic number 11, we have no evidence other than the order of atomic weights, the progression of ..."

2. The Electron: Its Isolation and Measurement and the Determination of Some of by Robert Andrews Millikan (1917)
"... of atomic number 2, since its nucleus has but two free positive charges, while its atomic weight is 4, we may imagine that its nucleus is actually made ..."

3. Smith's Intermediate Chemistry by Alexander Smith (1922)
"The helium atom (atomic number = 2) has two electrons, which are supposed to be situated on opposite sides of the nucleus — a very stable arrangement. ..."

4. Outlines of Theoretical Chemistry by Frederick Hutton Getman (1918)
"... the second series of elements are as follows: — Group number 01234567 Maximum valence ...0 1 2 3 4 5 6 7 Element He Li Be BCN 0 F atomic number 2 3 4 5 ..."

5. Organic Chemistry for Advanced Students by Julius Berend Cohen (1918)
"... negative charge of the electrons attached to the central nucleus is probably represented by the atomic number,2 which, with the exception of hydrogen, ..."

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