OF the rare gases, argon is the only one of which the crystal structure is known (F. Simon and V. Simson, Zeit. f. Phys., 25, 160; 1924). We have now been able to determine the crystal structure ...

and the apparently widely different assumptions which have been introduced in various recent attempts to develop a theory of atomic constitution capable of accounting for other physical and ...

Atoms consist of a nucleus containing protons and neutrons, surrounded by electrons in shells. The structure of the nucleus - CCEA In this CCEA study guide, you can revise and learn the atomic ...