Bohrium

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Niels Bohr
Bohrium hassium meitnerium ceremony

Bohrium is a synthetic chemical element with the symbol Bh and atomic number 107. It is named after the Danish physicist Niels Bohr. As a synthetic element, it is not found naturally on Earth and can only be created in a laboratory.

Discovery[edit | edit source]

Bohrium was first synthesized in 1981 by a team of scientists at the Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany. The team, led by Peter Armbruster and Gottfried Münzenberg, bombarded a target of bismuth-209 with accelerated nuclei of chromium-54, resulting in the creation of bohrium.

Properties[edit | edit source]

Bohrium is a member of the transition metals and is part of the 7th period and group 7 of the periodic table. Due to its position in the periodic table, it is expected to have similar properties to other group 7 elements, such as manganese, technetium, and rhenium. However, due to its short half-life, many of its properties have not been observed directly.

Physical Properties[edit | edit source]

The physical properties of bohrium are largely unknown due to its extremely short half-life. It is expected to be a solid under normal conditions and to have a high density.

Chemical Properties[edit | edit source]

Bohrium is expected to exhibit chemical properties similar to those of other group 7 elements. It is predicted to form compounds in the +7 oxidation state, similar to rhenium and technetium.

Isotopes[edit | edit source]

Several isotopes of bohrium have been synthesized, with the most stable isotope being bohrium-270, which has a half-life of approximately 61 seconds. Other isotopes include bohrium-267, bohrium-271, and bohrium-272, all of which have shorter half-lives.

Applications[edit | edit source]

Due to its short half-life and the difficulty in producing it, bohrium has no practical applications outside of scientific research. It is primarily used in the study of the properties of heavy elements and the synthesis of new elements.

See Also[edit | edit source]

References[edit | edit source]

External Links[edit | edit source]

Group 1 2   3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Hydrogen &
alkali metals
Alkaline earth metals Triels Tetrels Pnicto­gens Chal­co­gens Halo­gens Noble
gases
Period

1

[[

hydrogen |Hydro­gen1H1.0080]]

[[

helium |He­lium2He4.0026]]

2 [[

lithium |Lith­ium3Li6.94]]

[[

beryllium |Beryl­lium4Be9.0122]]

[[

boron |Boron5B10.81]]

[[

carbon |Carbon6C12.011]]

[[

nitrogen |Nitro­gen7N14.007]]

[[

oxygen |Oxy­gen8O15.999]]

[[

fluorine |Fluor­ine9F18.998]]

[[

neon |Neon10Ne20.180]]

3 [[

sodium |So­dium11Na22.990]]

[[

magnesium |Magne­sium12Mg24.305]]

[[

aluminium |Alumin­ium13Al26.982]]

[[

silicon |Sili­con14Si28.085]]

[[

phosphorus|Phos­phorus15P30.974]]

[[

sulfur |Sulfur16S32.06]]

[[

chlorine |Chlor­ine17Cl35.45]]

[[

argon |Argon18Ar39.95]]

4 [[

potassium |Potas­sium19K39.098]]

[[

calcium |Cal­cium20Ca40.078]]

[[

scandium |Scan­dium21Sc44.956]]

[[

titanium |Tita­nium22Ti47.867]]

[[

vanadium |Vana­dium23V50.942]]

[[

chromium |Chrom­ium24Cr51.996]]

[[

manganese |Manga­nese25Mn54.938]]

[[

iron |Iron26Fe55.845]]

[[

cobalt |Cobalt27Co58.933]]

[[

nickel |Nickel28Ni58.693]]

[[

copper |Copper29Cu63.546]]

[[

zinc |Zinc30Zn65.38]]

[[

gallium |Gallium31Ga69.723]]

[[

germanium |Germa­nium32Ge72.630]]

[[

arsenic |Arsenic33As74.922]]

[[

selenium |Sele­nium34Se78.971]]

[[

bromine |Bromine35Br79.904]]

[[

krypton |Kryp­ton36Kr83.798]]

5 [[

rubidium |Rubid­ium37Rb85.468]]

[[

strontium |Stront­ium38Sr87.62]]

[[

yttrium |Yttrium39Y88.906]]

[[

zirconium |Zirco­nium40Zr91.224]]

[[

niobium |Nio­bium41Nb92.906]]

[[

molybdenum|Molyb­denum42Mo95.95]]

[[

technetium|Tech­netium43Tc​[97]]]

[[

ruthenium |Ruthe­nium44Ru101.07]]

[[

rhodium |Rho­dium45Rh102.91]]

[[

palladium |Pallad­ium46Pd106.42]]

[[

silver |Silver47Ag107.87]]

[[

cadmium |Cad­mium48Cd112.41]]

[[

indium |Indium49In114.82]]

[[

tin |Tin50Sn118.71]]

[[

antimony |Anti­mony51Sb121.76]]

[[

tellurium |Tellur­ium52Te127.60]]

[[

iodine |Iodine53I126.90]]

[[

xenon |Xenon54Xe131.29]]

6 [[

caesium |Cae­sium55Cs132.91]]

[[

barium |Ba­rium56Ba137.33]]

1 asterisk [[

lutetium |Lute­tium71Lu174.97]]

[[

hafnium |Haf­nium72Hf178.49]]

[[

tantalum |Tanta­lum73Ta180.95]]

[[

tungsten |Tung­sten74W183.84]]

[[

rhenium |Rhe­nium75Re186.21]]

[[

osmium |Os­mium76Os190.23]]

[[

iridium |Iridium77Ir192.22]]

[[

platinum |Plat­inum78Pt195.08]]

[[

gold |Gold79Au196.97]]

[[

Mercury (element)|Mer­cury80Hg200.59]]

[[

thallium |Thallium81Tl204.38]]

[[

lead |Lead82Pb207.2]]

[[

bismuth |Bis­muth83Bi208.98]]

[[

polonium |Polo­nium84Po​[209]]]

[[

astatine |Asta­tine85At​[210]]]

[[

radon |Radon86Rn​[222]]]

7 [[

francium |Fran­cium87Fr​[223]]]

[[

radium |Ra­dium88Ra​[226]]]

1 asterisk [[

lawrencium |Lawren­cium103Lr​[266]]]

[[

rutherfordium|Ruther­fordium104Rf​[267]]]

[[

dubnium |Dub­nium105Db​[268]]]

[[

seaborgium |Sea­borgium106Sg​[269]]]

[[

bohrium |Bohr­ium107Bh​[270]]]

[[

hassium |Has­sium108Hs​[269]]]

[[

meitnerium |Meit­nerium109Mt​[278]]]

[[

darmstadtium |Darm­stadtium110Ds​[281]]]

[[

roentgenium |Roent­genium111Rg​[282]]]

[[

copernicium |Coper­nicium112Cn​[285]]]

[[

nihonium |Nihon­ium113Nh​[286]]]

[[

flerovium |Flerov­ium114Fl​[289]]]

[[

moscovium |Moscov­ium115Mc​[290]]]

[[

livermorium |Liver­morium116Lv​[293]]]

[[

tennessine |Tenness­ine117Ts​[294]]]

[[

oganesson |Oga­nesson118Og​[294]]]

1 asterisk [[

lanthanum |Lan­thanum57La138.91]]

[[

cerium |Cerium58Ce140.12]]

[[

praseodymium|Praseo­dymium59Pr140.91]]

[[

neodymium |Neo­dymium60Nd144.24]]

[[

promethium |Prome­thium61Pm​[145]]]

[[

samarium |Sama­rium62Sm150.36]]

[[

europium |Europ­ium63Eu151.96]]

[[

gadolinium |Gadolin­ium64Gd157.25]]

[[

terbium |Ter­bium65Tb158.93]]

[[

dysprosium |Dyspro­sium66Dy162.50]]

[[

holmium |Hol­mium67Ho164.93]]

[[

erbium |Erbium68Er167.26]]

[[

thulium |Thulium69Tm168.93]]

[[

ytterbium |Ytter­bium70Yb173.05]]

 
1 asterisk [[

actinium |Actin­ium89Ac​[227]]]

[[

thorium |Thor­ium90Th232.04]]

[[

protactinium|Protac­tinium91Pa231.04]]

[[

uranium |Ura­nium92U238.03]]

[[

neptunium |Neptu­nium93Np​[237]]]

[[

plutonium |Pluto­nium94Pu​[244]]]

[[

americium |Ameri­cium95Am​[243]]]

[[

curium |Curium96Cm​[247]]]

[[

berkelium |Berkel­ium97Bk​[247]]]

[[

californium |Califor­nium98Cf​[251]]]

[[

einsteinium |Einstei­nium99Es​[252]]]

[[

fermium |Fer­mium100Fm​[257]]]

[[

mendelevium|Mende­levium101Md​[258]]]

[[

nobelium |Nobel­ium102No​[259]]]



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