Covalent compounds lab
Here is a site with lots of molecules to peruse. It requires Chime and RasMol.
Here is another molecular viewer: Molecule viewer
You will need to select the molecule of interest and wait for Java to appear. Once your molecule appears, be sure to do the following:
1st - Select JaMM2
2nd - turn draw mode to Ball and Stick
3rd - under options, check the hydrogens box
Hold the left mouse button while moving the mouse to rotate the molecule
Hold the right mouse button while moving the mouse to enlarge or reduce the molecule
Clicking once on an atom will tell you details about that atom.
NH3 View image
SF6 courtesy of 3dchem.com - View image