Re: is ionized helium chemically reactive? if not, why not?

Of course ionized helium is chemically reactive. But it isn't going to do what 
I think you are hoping for, that is, react like hydrogen. Instead, it will be 
a ferocious oxidizing agent, grabbing electrons from anything handy.

Ionized helium is not found in nature except in stars and other regions of high 
energy flux. In interstellar space, there is lots of ionized hydrogen. But, as 
far as I know, ionized helium is not found because if it is formed and 
subsequently collides with hydrogen (there are 3-4 H atoms per He atom in the 
universe), it grabs an electron from the hydrogen.

Dan Berger