Element Bismuth

Bismuth ElementIt is a chemical element with the symbol Bi and atomic number 83.
It is a pentavalent post-transition metal and one of the pnictogens with chemical properties resembling its lighter homologs arsenic and antimony.
Elemental bismuth may occur naturally, although its sulfide and oxide form important commercial ores. The free element is 86% as dense as lead.
It is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge.
Bismuth is the most naturally diamagnetic element, and has one of the lowest values of thermal conductivity among metals.

Names and Identifiers

Chemical Formula:Bi
Molecular Weight:208.98000g/mol
EC Number :231-177-4
MDL Number:MFCD00134033
Color:lustrous reddish white
Other Names:n/a
PubChem CID:5359367
IUPAC Name:Bismuth
Canonical SMILES:[Bi]
ICSC Number:n/a

Physical & Chemical Properties

Boiling Point:1837 K ​(1564 °C, ​2847 °F)
Melting Point:544.7 K ​(271.5 °C, ​520.7 °F)
Molecular Formula:Bi
Flash Point:n/a
Exact Mass:208.98000
Symbol:Globally Harmonized System of Classification
Signal Word:Danger
Hazard Statements:H228
Precautionary Statements:P210-P370 + P378
Hazard Codes:F:Flammable
Risk Phrases:R11
Safety Phrases:S16-S45-S36/37/39-S26
RIDADR:UN 3264 8/PG 3
WGK Germany:1
Packaging Group:III
Hazard Class:8

The only primordial isotope of bismuth, bismuth-209, was traditionally regarded as the heaviest stable isotope, but it had long been suspected to be unstable on theoretical grounds

Naturally occurring isotopes

IsotopeMass/DaNatural abundance (atom %)Nuclear spin (I)Magnetic moment (μ/μN)
209Bi208.980374 (5)1009/24.1106

Radiosotope data

IsotopeMass/DaHalf-lifeMode of decayNuclear spinNuclear magnetic moment
205Bi204.9773715.31 dEC to 205Pb9/24.16
206Bi205.978486.243 dEC to 206Pb64.60
207Bi206.9784635 yEC to 207Pb9/24.08
208Bi207.979733.68 x 105 yEC to 208Pb5
210Bi209.984105.01 dβ to 210Po; α to 206Tl1-0.0445

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