What is the rarest substance on earth?

Answer 1

The rarist sbstance on earth is "Henweigh"

"Henweigh"?


Whats a "Henweigh"?


ohhh.......4 or 5 pounds.




Cluck, cluck....Astatine.....goes the chicken
Yours:; Grumpy

Answer 2

It depends what you call substance.

If you mean 'element' from the periodic table, and only those that occur naturally and are stable, then irridium would be it, and we could go more specific about the rarest stable irriduim isotope ir191.

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

If you want to consider naturally occuring chemical compounds, then as each person's DNS is unique, it therefore exist in only very limited quantity. You could pick a single cell protozoa, and play around with its DNA so that it is unique, and voila, a unique molecule. Also, proteins can have a huge number of variations, some of which could be unique, some of which may have been unique at a point and has since been destroyed, and so on.

In the end, the rarest substance is one that we have not found yet, for it is unique and still hiding somewhere.

Answer 3

ASTATINE AT A GLANCE
Name: From the Greek astatos, unstable.
Atomic mass: (210)
History: First produced in 1940 by Dale R. Corson, K. R. MacKenzie, and Emilio Segrè at the University of California, Berkeley, by bombarding a bismuth isotope with particles.
Occurrence: The rarest of the 92 naturally occurring elements; less than 30 g exists on Earth at any one time as a natural by-product of uranium and thorium decay.
Appearance: Solid nonmetal of unknown color at room temperature.
Behavior: Highly radioactive; decays very quickly.
Uses: None.

Answer 4

Diamonds it quite is the purpose of this interactive adventure -- to instruct you what the data are, so as which you will decide for your self! DIAMONDS… the issue of lore and legend. Rarest substance on earth? Or as undemanding as Carbon? properly certainly -- the two! Diamonds are in actuality composed of a single element, Carbon, possibly the main undemanding substance on earth and yet, whilst it quite is uncovered to large warmth and stress many, many miles below the Earth's Crust this undemanding Carbon is converted into the rarest of medicine -- Diamond! in this variation, needed transformations ensue, transformations to the very crystal shape of Carbon that supply the ensuing stone astonishing properties. just to call a sort of properties, is its hardness. in simple terms how not user-friendly Diamond is isn't achieveable to tell properly (because of the fact we don't have something greater sturdy to gauge it against) in spite of the shown fact that it quite is anticipated that Diamonds are interior the area of a hundred,000 cases greater sturdy than the subsequent toughest substance! yet, greater importantly for the purpose of this internet site, "What constitutes value or high quality in a diamond?". In 2 words, rarity and sweetness. the two at the instant are not inevitably the comparable, besides the reality that the two play an quintessential place. DeBeers separates their tough Diamonds into over 5000 distinctive categories. in spite of the shown fact that, for sure for the undemanding client this could be a techniques too complicated, so, over the direction of time there has developed a grading equipment that divides those factors of Rarity and sweetness into 4 class systems. they are typical because of the fact the "4 C's" - decrease, shade, readability and Carat weight. regrettably this oversimplification does not account for all the numerous factors that make a diamond uncommon or appropriate, in spite of the shown fact that it does supply a stable commencing element. Following is a quick rationalization of each and every of those 4 factors.

Answer 5

The element astatine is the rarest element in the Earth's crust, with around 25 g (0.9 oz) in total occurring naturally. Astatine is a member of the halogen group of elements, which also includes, chlorine, fluorine, and iodine. The element was discovered in 1931.

Answer 6

The rarest substance on earth is Iridium, which we find only in comets that hit Earth.

Answer 7

Astatine is the rarest substance on Earth.

(2nd to last paragraph)

http://pubs.acs.org/cen/80th/astatine.html

Answer 8

Patience

Answer 9

Astatine - Probably no more than a few grams in the entire Earth's crust.

Answer 10

Unobtanium