Elements word chain

I thought we could have a word chain of the elements of the periodic table (if it hasn't been done before - I've only just started looking at the message board). Say I begin with "hydrogen", then the next person has to post a comment with another element, starting with N (the last letter of hydrogen), and so on.

Then I realised this will probably not last very long, so here is another challenge for you quiz experts: what would be the longest possible element word chain?

I think we need to have the rule that each element can only be used once, in case it ends up in a "perpetual check" ping-pong between the same two elements and never ends.

Have a quizzical day!