As the other partner say, in spanish doesn't exist "la silencia o la silencio" we allways use "el" and the right word is "silencio", it is as a male word. Both ideas are right "El silencio invadía todo" and "El silencio todo lo invadía". The first option is used in common speaks and the second one is more artistic, as if you are reading a book like Hamlet or poetry...