Is there a shortcut to open the 3D view? Is there a shortcut to go to 3D view when you are in another view, such the UV/Image editor or the Node Editor?

I can't find it.
Shift + F1 - F12 keys 

F5 for 3D view.



F3 = Node Editor

F4 = Console

F5 = 3D View

F6 = Curve editor

F7 = Properties

F8 = VSE

F9 = Outliner

F10 = Image/Uv editor

F11 = Text Editor

F12 = Dopesheet editor

Don't know where timeline went.