Wow - I remember working with hydrogen in chemistry class and I'm having trouble imagining something even more dangerous than regular hydrogen! It was the highlight of the year for us - we created a tiny amount of hydrogen gas (H2) from water and captured it inside an upside-down test tube. (Since hydrogen is lighter than air, it stayed in the open tube.
Then we got to light the hydrogen on fire! I bet they don't let them do that anymore. Almost the only thing I remember from chemistry!
I didn't know you could make monatomic minerals like gold (and I'm not sure why you would want to) but it does stand to reason they would have different properties. After all, O2 and O3 are very different beasts (O2 is the air we breathe and O3 is ozone, as in the ozone layer - great to have in the atmosphere but deadly pollution on the ground.)