ストロンチウム９０：ストロンチウムの放射性同位体の一つ；放射性降下物に含まれ人体に有害。の英語

Strontium 90: One of the radioisotopes of strontium; part of radioactive fallout, harmful to human health.

strontium 90

a radioactive isotope of strontium (with the mass number 90) that is present in the fallout from nuclear explosions

a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol)

Hungarian chemist who studied radioisotopes and was one of the discoverers of the element hafnium (1885-1966)

an interaction between elementary particles involving neutrinos or antineutrinos that is responsible for certain kinds of radioactive decay

a hard and corrosion resistant mineral that is a natural alloy of osmium and iridium (usually containing small amounts of rhodium and platinum)

the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)

comprises genera Hamamelis, Corylopsis, Fothergilla, Liquidambar, Parrotia, and other small genera

distinguish (an element or atom) by using a radioactive isotope or an isotope of unusual mass for tracing through chemical reactions

any of a family of glassy minerals analogous to feldspar containing hydrated aluminum silicates of calcium or sodium or potassium

a multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells

to remove oxygen from a compound, or cause to react with hydrogen or form a hydride, or to undergo an increase in the number of electrons

a poisonous colorless flammable gas used in organic synthesis and to dope transistors and as a poison gas in warfare

any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium

a white crystalline strong-smelling hydrocarbon made from coal tar or petroleum and used in organic synthesis and as a fumigant in mothballs

the oxidation of ammonium compounds in dead organic material into nitrates and nitrites by soil bacteria (making nitrogen available to plants)

Canadian physicist who bounced neutron beams off of atomic nuclei to study the structure of matter (1918-2003)

any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions

a white powder comprised of calcium hydroxide and chloride and hypochlorite and used to bleach and/or disinfect

pertaining to or containing any of a group of organic compounds of nitrogen derived from ammonia

a chemical bond consisting of a hydrogen atom between two electronegative atoms (e.g., oxygen or nitrogen) with one side be a covalent bond and the other being an ionic bond

oily poisonous liquid amine obtained from nitrobenzene and used to make dyes and plastics and medicines

used of a compound (especially of carbon) containing atoms sharing more than one valence bond

the chemistry of compounds containing carbon (originally defined as the chemistry of substances produced by living organisms but now extended to substances synthesized artificially)

any of a class of unstable chemical compounds resulting from the addition of ozone to a double bond in an unsaturated compound

a group of white or reddish crystalline minerals of the zeolite family consisting of a hydrous silicate of calcium and potassium and aluminum

an inactive substance that is a vehicle for a radioactive tracer of the same substance and that assists in its recovery after some chemical reaction

sour-tasting liquid produced usually by oxidation of the alcohol in wine or cider and used as a condiment or food preservative

a mineral that is a complex borosilicate and hydroxide of aluminum containing iron and magnesium and calcium and lithium and sodium