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seaborgium – bohrium – hassium
Re Bh
	Full table

Known properties

Name, Symbol, Number

Bohrium, Bh, 107

Chemical series

Transition metals

Group, Period, Block

7, 7, d

AppearanceFor alternative meanings, see color (disambiguation). visual arts. Color (or colour is a sensation which (in humans) derives from the ability of the fine structure of the eye to distinguish three differently filtered analyses of a view. The perception of

unknown; probably metallic,
silvery white or gray

Atomic weightIn reference to a certain isotope of a chemical element, atomic weight (more accurately relative atomic mass though also called simply atomic mass is the mass of one atom of the isotope expressed in units atomic mass unit amu) such that the Carbon-12 isot

[264] amu]]

Electron configurationElectron configuration is the arrangement of electrons in an atom, molecule or other body. Specifically, it is the placement of electrons into atomic, molecular, or other forms of electron orbitals. Orbitals, states, and wavefunctions Since electrons are

probably [ RnAstatine Radon Xe Rn Uuo Full table General Name, Symbol, NumberRadon, Rn, 86 Chemical series Noble gases Group, Period, Block 18 (VIIIA), 6 , p Density, Hardness 9. 73 kg/m3 (273 K), NA Appearance colorless Atomic properties Atomic weight [222] amu Atomi]5 f¹⁴ 6d⁵ 7 s²

e^-The electron (also called negatron commonly represented as e&minus is a subatomic particle. In an atom the electrons surround the nucleus of protons and neutrons in an electron configuration. Electrons have the smallest electrical charge and when they mov 's per energy levelAn energy level is a quantified stable energy, which a physical system can have; the term is most commonly used in reference to the electron configuration of electrons, in atoms or molecules. According to quantum theory, only certain energy levels are pos

2, 8, 18, 32, 32, 13, 2

State of matter

Presumably a solid

1 History

It was synthesized in 1976 by a Soviet team led by Y. Oganessian at the Joint Institute for Nuclear Research at Dubna, who produced isotope ²⁶¹Bh with a half-life of 1-2 ms (later data give a half life of around 10 ms). They did this by bombarding bismuth-204 with heavy nuclei of chromium-54.

In 1981 a German research team led by P. Armbruster and G. Münzenberg at the Gesellschaft für Schwerionenforschung (Institute for Heavy Ion Research) at Darmstadt were also able to confirm the Soviet team's results and produce bohrium, this time the longer-lived Bh-262.

The Germans suggested the name nielsbohrium to honor the Danish physicist Niels Bohr. The Soviets had suggested this name be given to element 105 ( dubnium).

There was an element naming controversy as to what the elements from 101 to 109 were to be called; thus IUPAC adopted unnilseptium (symbol Uns) as a temporary name for this element. In 1994 a committee of IUPAC recommended that element 107 be named bohrium. While this conforms to the names of other elements honoring individuals, where only the surname is taken, it was opposed by many who were concerned that it could be confused with boron. Despite this, the name bohrium for element 107 was recognized internationally in 1997.

2 External links

Chemical elements Metals

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