Element Mendelevium

Mendelevium ElementMendelevium was discovered by bombarding einsteinium with alpha particles in 1955, the same method still used to produce it today.
It was named after Dmitri Mendeleev, father of the periodic table of the chemical elements.
Mendelevium is a synthetic element with the symbol Md (formerly Mv) and atomic number 101.
In the periodic table, mendelevium is located to the right of the actinide fermium, to the left of the actinide nobelium, and below the lanthanide thulium.
Mendelevium metal has not yet been prepared in bulk quantities, and bulk preparation is currently impossible. Nevertheless, a number of predictions and some preliminary experimental results have been done regarding its properties.

Names and Identifiers

Chemical Formula:Md
CAS:7440-11-1
Molecular Weight:258.00000g/mol
EC Number :n/a
MDL Number:n/a
Color:unknown (presumably metallic/ silvery white/ gray)
Other Names:Mendelevio
PubChem CID:23943
IUPAC Name:Mendelevium
Inchl:InChI=1S/Md
InChI Key:MQVSLOYRCXQRPM-UHFFFAOYSA-N
Canonical SMILES:[Md]
ICSC Number:n/a

Physical & Chemical Properties

Phase:Solid
Density:10.3 g/cm³
Boiling Point:1100 K ​(827 °C, ​1521 °F)
Melting Point:n/a
Molecular Formula:Md
Flash Point:n/a
Exact Mass:258.09800

Sixteen isotopes of mendelevium are known, with mass numbers from 245 to 260; all are radioactive

Radiosotope data

IsotopeMass/DaHalf-lifeMode of decayNuclear spinNuclear magnetic moment
255Md255.0910827 mα to 251Es; EC to 255Fm; SF7/2
256Md256.09411.3 hα to 252Es; EC to 256Fm; SF
257Md257.0955357 mα to 253Es; EC to 257Fm; SF7/2
258Md258.09857 (22)51.5 dEC to 258Fm8
259Md259.10051.6 hα to 255Es; SF7/2
260Md260.10432 dEC to 260Fm; α to 256Es; β to 260No

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