What is the rarest chemical element of the universe?

What is the rarest chemical element of the universe?
We have so much oxygen to breathe, have a lot of carbon dioxide to pollute our lungs, we have so much water to drink … These substances have the elements oxygen (O), carbon (C) an
d hydro
gen (H). But the rarest element? The radioactive element astatine is so rare that its inclusion in the Periodic Table of the Elements was made at first in theoretical character. Currently there are a total of 31 grams of the material on earth.

Electrons of astatine

Astatine [in portuguese Astato or Ástato]

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Much of the people may have saved from Periodic Table of Elements only the minimum necessary to cross some tests hairy during high school. But there are some curiosities that make it worth a quick revisit. For example: what is the rarest element found there? Answer: astatine [At].

How much rare? Very. In fact, there are currently only 31 grams of the substance on earth. Indeed, its inclusion among the other chemical elements made, at first only by a theoretical necessity — “should” be an element with 85 protons in its nucleus.

However, after some time, scientists were able to prove the existence of the substance obtained in the laboratory. But experience is of considerable difficulty. That’s because the astatine is so radioactive that vaporizes himself when he raked in a considerable amount! It’s probably why, even today, there is a practical application for the element — which only serves to theoretical studies, and usually through their isotopes.

— Atomic number: 85

— Family: VIIA [halogens]

— Group: 17 [halogens]

— Period: 6

— Electrons: 2,8,18,32,18,7

— Physical State: Solid

— Density: [unknown]

— Melting point: 302°C [576°F]

— Boiling point: 337°C [639°F]

Source: Mega Curioso; Wikipedia