Mendelevium

Mendelevium
General Info
Atomic Symbol	Atomic symbol::Md
Atomic Number	Atomic number::101
Atomic Weight	Atomic weight::258 g/mol
Chemical series	Actinides
Appearance	Unknown
Group, Period, Block	n/a, 7, f
Electron configuration	[Rn] 5f13, 7s2
Electrons per shell	2, 8, 18, 32, 31, 8, 2
CAS number	CAS number::7440-11-1
Physical properties
Phase	Solid
Density	Density::Unknown g/ml
Melting point	Melting point::1100K
Boiling point	Boiling point::Unknown
Isotopes of Mendelevium
iso NA half-life DT DE (MeV) DP is stable with neutrons.
All properties are for STP unless otherwise stated.

Mendelevium (pronounced men-deh-LEE-vi-em) is a radioactive chemical element with the symbol Md and the atomic number 101. It is a metal, classified as a transitional element and a transuranic actinide, which is located in the bottom row of the periodic table. This element was discovered by the University of Berkeley, and named after Dimitri Mendeleev, who developed the Periodic Table.

Properties

Mendelevium is a solid, which is synthetic or man-made. This element is synthesized bombarding other elements like Einsteinium with charge particles.²⁵⁶Md has been used used to find some of the chemical properties in aqueous solution. This element has moderately stable dispositive oxidation state and can be shown to have a monopositive state.

Discovery

Mendelevium was first discovered by Albert Ghiorso, Glenn T. Seaborg, Gregory R. Choppin, Bernard G. Harvey, and Stanley G. Thompson in 1955 at the University of California, Berkeley.it is named in honor of Dimitri Mendeleev who developed the Periodic Table of elements. Berkeley researchers produced 256Md when they after bombarding Es with alpha particles in the Radiation Laboratory's 60-inch cyclotron(a type of particle accelerator).

Mendelevium Compound

The sections of binary compound with some compounds of mendelevium have a formal oxidation number for Mendelevium. However, uses of this compound limited for p-block element. Looking at oxidation number, and electronic configuration are not given. Exotic compound only view this as guide. In compounds of Mendelevium, the common oxidation number is three.

Hydrides •none listed

Fluorides •none listed

As a result, Mendelevium does not have compounds.

Uses

Mendelevium does not exist in nature and was been produced in small amounts which are expensive and are time consuming to synthesize. It used for scientific research.

Dmitri Mendeleev

Picture of Dmitri Mendeleev

Dimitri Mendeleev was born in Tobolsa, Samaria in 1834 and died in 1967. He arranged the elements into the periodic table based on atomic weight. His first periodic table was arranged by increasing atomic weight and grouping them by similarity of properties. However, he wasn't able to knew about noble gas element, which he does not included in the periodic table.He studied thermal expansion which is the concept of changing matter and changing temperatures. At the end of his age, he retire from being college professor.

Isotope

Mendelevium has eighteen radioisotopes. Md258 is the most stable isotopes and this isotopes bombardment of isotopes of element Einstein.

Isotope	Atomic Mass	Half-life
Md245	245.08	0.90 ms
Md246	246.081	1 seconds
Md247	247.08	1.12 seconds
Md248	248.082	7 seconds
Md249	249.03	24 seconds
Md250	250.084	52 seconds
Md251	251.084	4 minutes
Md252	252.086	2.3 minutes
Md253	253.087	12 minutes
Md254	254.089	10 minutes
Md255	255.091	27 minutes
Md256	256.094	77 minutes
Md257	257.095	5.52 hours
Md258	258.098	51.5 days
Md258m		57 minutes
Md259	259.1	1.6 hours
Md260	260.1	31.8 days
Md261	261.1	~40 minutes
Md262	262.1	~3 minutes