The atomic weight of argon is based on analyses of argon separated from air. In 1961, the Commission changed the recommended value of Ar(Ar) from 39.944, ...

Argon is a chemical element; it has symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. Argon is the third most ...

Isotope · Relative Atomic Mass · Isotopic · Composition · Standard Atomic Weight · Notes. 18, Ar, 36, 35.967 545 105(28), 0.003 336(21), 39.948(1), g,r.

Name, Argon ; Symbol, Ar ; Atomic Number, 18 ; Atomic Mass, 39.948 atomic mass units ; Number of Protons, 18.

The mass number of Argon is 40 . Relative atomic mass: The stable isotopes of Argon are ( 36 Ar , 38 Ar , and 40 Ar ) . The abundance of 36 Ar is 0 . 334 % .

30 окт. 2024 г. · argon (Ar), chemical element, inert gas of Group 18 (noble gases) of the periodic table, terrestrially the most abundant and industrially ...