Look up at the night sky with the naked eye or through a telescope and practically everything you will see is hydrogen. Very, very hot hydrogen. You could call it the universe's MVP because wherever you have stuff this, the smallest atom, is bound to be nearby.

Here on earth though hydrogen is practically nonexistent in gas form. That's because it either floats up out of the atmosphere or grabs on to the nearest atom it can find. We've trapped a few gajillion of these wayward atoms for you and put them in this attractive cube that sits at the tippity top of the periodic table.