Assertion: thorium | /r/HasProperty | radioactive
Facets:
value: weakly
type: DEGREE
value: slightly
type: DEGREE
value: in 1898
type: TEMPORAL
value: with small ammounts
type: OTHER
value: quite
type: DEGREE
value: highly
type: DEGREE
value: with symbol th
type: OTHER
value: from actinide series
type: LOCATION
value: with atomic number
type: OTHER
value: by the polish-french physicist
type: OTHER
value: by the german chemist
type: OTHER
value: independently
type: MANNER
value: like all the other actinides
type: OTHER
value: chemically
type: MANNER
Source sentences:
text: Thorium was first observed to be radioactive in 1898, by the German chemist Gerhard Carl Schmidt and later that year, independently, by the Polish-French physicist Marie Curie.
text: Thorium is a radioactive chemical element that could in theory be used to generate large quantities of low-carbon electricity in future decades.
text: Thorium is chemically reactive and is attacked by oxygen, hydrogen, the halogens and sulfur.
text: Thorium, which refers to thorium-232, is a radioactive metal that is about three times more abundant than uranium in the natural environment.
text: Discovered in 1828 by a Swedish chemist who named the element after the Norse god of thunder, Thor, thorium is a slightly radioactive element that is naturally occurring in the Earth’s crust.
text: Both Uranium and Thorium are weakly radioactive elements and are composed of a number of radioactive isotopes.
text: Thorium is a radioactive substance that occurs naturally in the environment.
text: Thorium (pronounced as THOR-ee-em) is a less radioactive metal that belongs to the family of actinides and denoted by the chemical symbol Th .
text: Th, a radioactive chemical element; the first member of the actinide series in Group III of Mendeleev’s periodic system.
text: Gerhard Schmidt, a German chemist, and Marie Curie, a Polish physicist, independently discovered that thorium was radioactive in 1898 within a couple months of each other, according to Chemicool.
text: Thorium is radioactive, but has a very slow rate of decay and the radiation it emits is not absorbed by the body, which means that it can safely be used for some important applications.
text: Like all the other actinides, thorium is radioactive and has sometimes been used in the production of nuclear energy.
text: Although thorium is radioactive, its 14 billion-year half-life is so long that most of that originally found on Earth's is still there.
text: Thorium is radioactive and can be stored in bones.
text: Since thorium is radioactive and may be stored in bone for a long time, bone cancer is also a potential concern for people exposed to thorium.
text: Thorium is radioactive.
text: Thorium is radioactive and produces the radioactive gas radon-220 as one of its decay products.
text: Thorium is weakly radioactive, has a high melting point, and is available with more abundance than uranium as an element.
text: At the time, Berzelius did not realize that thorium was radioactive.
text: She and Schmidt announced at almost the same time in 1898 that Berzelius' thorium was radioactive.
text: Thorium is weakly radioactive : all its known isotopes are unstable , with the seven naturally occurring ones (thorium-227, 228, 229, 230, 231, 232, and 234).
text: Thorium (symbol Th, atomic number 90) is a radioactive chemical element.
text: Thorium is a radioactive chemical element; it has six known isotopes, they are all unstable.
text: Thorium is a radioactive chemical element that has the atomic number 90 and the symbol
text: Thorium is a radioactive chemical element that has the atomic number 90 and the symbol Th.
text: Thorium is a radioactive chemical element that belongs to the actinide series.
text: Thorium is a radioactive chemical element that can be found in soil and rocks.
text: Thorium is a weakly radioactive chemical element from actinide series with symbol Th and atomic number 90.
text: Thorium is highly reactive and can form different compounds.
text: It is quite reactive and can ignite spontaneously if exposed to air when in finely divided form and forms thorium dioxide.
text: Thorium is a slightly radioactive metal with small ammounts naturally being found in small amounts in most rocks and soils.
text: It is a weakly radioactive metal.
text: Thorium is a slightly radioactive element discovered by Jons Jacob Berzelius in 1828.
text: Thorium is a weakly radioactive element.
text: Uranium and Thorium are radioactive elements.