We're looking for more cutting edge type designs. Can you take the rounding out of the left from max in #21? Also, #20 is just too hard to read and that is why I moved it to the other column.
I like the direction you are going. Can you play with gradients and more futuristic fonts? Remember, this is to represent the science behind a hydrogen molecule and is to be cutting edge. The plant, allbeit nice, doesn't seem to fit the look we are trying to achieve.
Please keep up the great work and thank you for all your ideas.