What is the rarest metal on earth?

Question

What is the rarest metal on earth?

Answer 1

Titanium

Answer 2

the rarest metal is of the platinum group (PGM) is iridium

http://en.citizendium.org/wiki/Iridium a little information on this metal.

Answer 3

the rarest natural metal is irridium.the rarest artificial metal is ununxium.

Answer 4

Truthonium, it is claimed that it does not exist at all.

(You end up looking at radiocative isotopes with very short half lives and which do not naturally exist in earth.)

http://www.curiousnotions.com/home/metal...

Answer 5

rubbish

the rarest of the platinum group (PGM) is iridium

It all depends on weather you'd consider only naturally occuring metals, or artificially produced one.

If artificial is OK, then just look at the latest element discovered on the periodic table, and home in to the heaviest element actually sythesized: ununxium, for which a single atom was produced (!) that decayed in a few millisecond.

For the naturally occuring elements, again it is mostly a case of mass (the heavier the element, the less likely it was sythesized naturally in exploding supernova, which is the way all heavier atoms were originally produced). On earth, the rarest metal is irridium, which is also the densest metal known