What is the rarest metal in the universe?

Answer 1

It all depends on whether 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.

Answer 2

It is Astatine. You will only find a maximum of 0.16 grammes of it on the entire earth. It is radioactive and is only created by the decaying of other elements. It itself decays extremely quickly.

Answer 3

The human race has not yet explored the entire universe (or even our entire galaxy) so we really do not have a basis upon which to answer such a question. It would be much more realistic to ask what is the rarest substance on Earth. There are a number of heavy elements whose half-lives are so short that they have very rarely existed at all, just long enough for scientists to confirm that such elements are possible. Examples are californium, einsteinium, nobelium. Whether something that doesn't exist at all should qualify as rare, is debatable. For substances that actually do exist, there is a perfume ingredient called ambergris which may qualify.

Answer 4

The rarest material on earth is antimatter. Only a few antimatter atoms have been made.

Answer 5

According to sources, Astatine (At) is the rarest naturally occurring element, roughy 25 grams are in the earth's crust at any given time. It has a half-life of only 8.3 hours.

Answer 6

The rarest naturally element is astatine. There is only approx. 25 grams of astatine in the entire earth's crust at any one time.

Answer 7

I consider francium as the rarest natural metal.

Answer 8

Woman. Especially my girlfriend.

Answer 9

Astatine