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*  Metalloid - Wikipedia
Sulfur is one of the oldest of the fungicides and pesticides. Phosphorus, sulfur, zinc, selenium and iodine are essential ... Carbon (as graphite) occurs naturally and is extracted by crushing the parent rock and floating the lighter graphite to the ... Some other elements are included for comparison: oxygen and xenon (the most and least abundant elements with stable isotopes); ... the selenide is neutralized by sulfuric acid H2SO4 to give selenous acid H2SeO3; this is reduced by bubbling with SO2 to yield ...
  https://en.wikipedia.org/wiki/Metalloid
*  Livermorium - Wikipedia
Livermorium is calculated to have some similar properties to its lighter homologues (oxygen, sulfur, selenium, tellurium, and ... The lighter chalcogens are also known to form a −2 state as oxide, sulfide, selenide, telluride, and polonide; due to the ... although formation of the lighter elements nobelium or seaborgium is more favored. One last possibility to synthesize isotopes ... The +4 state is known for sulfur, selenium, tellurium, and polonium, undergoing a shift in stability from reducing for sulfur( ...
  https://en.wikipedia.org/wiki/Livermorium
*  Selenium
... selenium → bromine S↑Se↓Te Periodic Table - Extended Periodic Table General Name, Symbol, Number selenium, Se, 34 Chemical ... In these compounds selenium plays an analogous role to sulfur. Selenium is most commonly produced from selenide in many sulfide ... Isotopes Main article: isotopes of selenium. Selenium has six naturally-occurring isotopes, five of which are stable: 74Se, 76 ... like its lighter chemical cousin sulfur. Selenium is found in economic quantities in sulfide ores such as pyrite, partially ...
  http://www.chemeurope.com/en/encyclopedia/Selenium.html
*  Thallium - Wikipedia
Combined with sulfur or selenium and arsenic, thallium has been used in the production of high-density glasses that have low ... Thallium selenide has been used in a bolometer for infrared detection. Doping selenium semiconductors with thallium improves ... Thallium has 25 isotopes which have atomic masses that range from 184 to 210. 203Tl and 205Tl are the only stable isotopes and ... The trihalides are more stable, although they are chemically distinct from those of the lighter group 13 elements and are still ...
  https://en.wikipedia.org/wiki/Thallium
*  Indium - Wikipedia
The indium isotopes lighter than 115In predominantly decay through electron capture or positron emission to form cadmium ... 3 H2O The analogous sesquichalcogenides with sulfur, selenium, and tellurium are also known. Indium forms the expected ... Indium is used in photovoltaics as the semiconductor copper indium gallium selenide (CIGS), also called CIGS solar cells, a ... Indium has 39 known isotopes, ranging in mass number from 97 to 135. Only two isotopes occur naturally as primordial nuclides: ...
  https://en.wikipedia.org/wiki/Indium
*  Mercury (element)
Isotopes Main article: Isotopes of mercury There are seven stable isotopes of mercury with 202Hg being the most abundant (29.86 ... Like ZnS, HgS crystallizes in two forms, the reddish cubic form and the black zinc blende form.[5] Mercury(II) selenide Mercury ... Afterwards, fine sulfur, zinc, or some other powder that readily forms an amalgam (alloy) with mercury at ordinary temperatures ... Compounds of mercury(I) Unlike its lighter neighbors, cadmium and zinc, mercury usually forms simple stable compounds with ...
  http://theinfolist.com/php/SummaryGet.php?FindGo=Mercury%20
*  Properties of metals, metalloids and nonmetals - Wikipedia
... sulfur as plastic sulfur;[31] and selenium as selenium wires.[32]. *^ For polycrystalline forms of the elements unless ... is seven times lighter than air, and ten per cent lighter than helium. It is the lightest solid known (0.16 mg/cm3), conductive ... hydrogen selenide H2Se, and hydrogen telluride H2Te, water should be "a foul-smelling, poisonous, inflammable gas…condensing to ... which would of course be isotopes of known elements but would not be neighbors of the irradiated element."[147][emphasis added ...
  https://en.m.wikipedia.org/wiki/Properties_of_metals,_metalloids_and_nonmetals
*  Chalcogen - Wikipedia
Isotopes with nuclear spins are more common among the chalcogens selenium and tellurium than they are with sulfur. Oxygen's ... The middle chalcogens (selenium and tellurium) have similar decay tendencies as the lighter chalcogens, but their isotopes do ... In many cases of selenium poisoning, selenous acid is formed in the body. Hydrogen selenide (H2Se) is highly toxic. Exposure to ... Sulfur tetrafluoride is also a well-known sulfur fluoride. Certain selenium fluorides, such as selenium difluoride, have been ...
  https://en.wikipedia.org/wiki/Chalcogen
*  Properties of metals, metalloids and nonmetals - Wikipedia
... sulfur as plastic sulfur; and selenium as selenium wires. For polycrystalline forms of the elements unless otherwise noted. ... is seven times lighter than air, and ten per cent lighter than helium. It is the lightest solid known (0.16 mg/cm3), conductive ... Extrapolating from the heavier hydrogen chalcogenides, namely hydrogen sulfide H2S, hydrogen selenide H2Se, and hydrogen ... which would of course be isotopes of known elements but would not be neighbors of the irradiated element."[emphasis added] In ...
  https://en.wikipedia.org/wiki/Properties_of_metals,_metalloids_and_nonmetals
*  Neptunium - Wikipedia
Heavier isotopes of neptunium decay quickly, and lighter isotopes of neptunium cannot be produced by neutron capture, so ... C or by reacting sulfur and neptunium hydride at 650 °C. Np2S5 is made by heating a mixture of Np3S5 and pure sulfur to 500 °C ... Neptunium selenide compounds that have been reported include NpSe, NpSe3, Np2Se3, Np2Se5, Np3Se4, and Np3Se5. All of these have ... only been obtained by heating neptunium hydride and selenium metal to various temperatures in a vacuum for an extended period ...
  https://en.wikipedia.org/wiki/Neptunium
*  Germanium - Wikipedia
IsotopesEdit. Main article: Isotopes of germanium. Germanium occurs in 5 natural isotopes: 70. Ge. , 72. Ge. , 73. Ge. , 74. Ge ... Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium ... Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver ... 2), diselenide (GeSe. 2), and the monosulfide (GeS), selenide (GeSe), and telluride (GeTe).[33] GeS2 forms as a white ...
  https://en.m.wikipedia.org/wiki/Germanium
*  Mercury (element) - Wikipedia
Isotopes. Main article: Isotopes of mercury. There are seven stable isotopes of mercury with 202. Hg being the most abundant ( ... Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium ... Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver ... Unlike its lighter neighbors, cadmium and zinc, mercury usually forms simple stable compounds with metal-metal bonds. Most ...
  https://en.m.wikipedia.org/wiki/Mercury_