Assertion: astatine | /r/HasProperty | rare
Facets:
value: extremely
type: DEGREE
value: on earth
type: LOCATION
value: currently
type: TEMPORAL
value: naturally
type: MANNER
value: in the entire universe
type: LOCATION
value: in nature
type: LOCATION
Source sentences:
text: Because astatine is so rare, it does not have any commercial uses.
text: Astatine is a very rare element, so there is not that much known about this element.
text: Astatine is the rarest element on Earth; only approximately 25 grams occur naturally on the planet at any given time.
text: Astatine is one of the rarest elements in the Earth’s crust .
text: Astatine is the rarest naturally occurring element.[l]
text: Astatine is currently Earth’s rarest element (only one ounce is contained within the entire planet’s crust).
text: Astatine, with an estimated total mass of 25 grams on Earth, is the rarest natural element here.
text: In ground-breaking experiments conducted at the radioactive isotope facility ISOLDE at CERN, a multinational research team has investigated the atomic structure of astatine (At), the rarest atom on our planet.
text: Astatine (Greek for "unstable") is a very rare radioactive element that occurs during the radioactive decay of uranium.
text: Astatine is an extremely rare and radioactive element.
text: Researchers at the Brookhaven National Laboratory have performed experiments measuring reactions involving astatine; however, this research is very limited as astatine is extremely rare (which is a consequence of its extremely short half-life).
text: Astatine is extremely rare in nature, and in fact, there is only about an ounce (about a teaspoonful) in the earth's crust at any one moment.
text: Astatine is so rare that scientists could not prove its existence for the longest time.
text: Astatine: Because astatine is radioactive and rare, there are no proven uses for this halogen element.
text: Astatine is very rare not only in the whole of the Earth but even in the entire universe.
text: For instance, Astatine is so rare that there’s less than 30 grams of it in the Earth’s crust.
text: Astatine is an extremely rare element - the rarest, very difficult to be identified in natural products; astatine was discovered first time by nuclear reactions between bismuth and high energy alpha particles in 1940 and in 1943 was discovered between the decay products of uaranium, actinium and thorium series.
text: Astatine is an extremely rare element - the rarest, very difficult to be identified in natural products; astatine was discovered first time by nuclear reactions between bismuth and high energy alpha particles in 1940 and in 1943 was discovered between the decay products of uaranium, actinium and thorium series.
text: Astatine is an extremely rare element - the rarest, very difficult to be identified in natural products; astatine was discovered first time by nuclear reactions between bismuth and high energy alpha particles in 1940 and in 1943 was discovered between the decay products of uaranium, actinium and thorium series.
text: Astatine is the rarest element on earth.
text: Astatine is the rarest element, other than the transuranic elements (those with a higher atomic number than uranium).
text: Astatine is the rarest element on Earth, and it is also highly unstable and radioactive.
text: Since astatine is usually only found as a state of another heavier element in the process of radioactive decay, astatine is one of the rarest elements on Earth.
text: It is one of the rarest elements in the universe.
text: Astatine is the rarest naturally occurring element.[l]
text: Astatine is currently Earth’s rarest element (only one ounce is contained within the entire planet’s crust).
text: So I guess technically Astatine and Francium is the rarest natural element on the earth that exists.