Full Idea
Russell preceded Wittgenstein in deciding that the reduction of all propositions to atomic propositions could not be achieved. The problem cases were negative propositions, general propositions, and belief propositions.
Gist of Idea
Russell gave up logical atomism because of negative, general and belief propositions
Source
report of Bertrand Russell (Logical Atomism [1924]) by Stephen Read - Thinking About Logic Ch.1
Book Reference
Read,Stephen: 'Thinking About Logic' [OUP 1995], p.17
A Reaction
'Reduction' presumably means expressing their form in symbolic logic. Since atomic propositions are ultimately expressed in natural language, the chances of a perfect fit with the world were nil.