EDIT: It is already fixed in the newer atom releases.

If you install and run Atom on Fedora 25 you may find that the program will not start, without throwing any error. It just won't open.

Running atom on a terminal will show you why:

/usr/share/atom/atom: error while loading shared libraries: libXss.so.1: cannot open shared object file: No such file or directory

This solution for this error is simple. Just run the following command on a terminal:

dnf install libXScrnSaver

Seems that the RPM is missing this dependency. The bug is already reported here.