Elements
101

Md

Mendelevium

Mendelevium (Md) is a radioactive metal that has the atomic number 101 in the periodic table, its appearance is not fully known due to the minuscule amounts produced of it. It is an Actinoid Metal with the symbol Md.

Mendelevium was discovered by bombarding einstenium with alpha particles in 1955 by Stanley Thompson, Glenn Seaborg, Gregory Choppin and Bernard Harvey. As it was the post 100 element to be discovered it was named after the founder of the periodic table, Mendeleev. Because the element was discovered during the Cold War, Seaborg had to apply to the US Government for permission to name it after a Russian. Mendelevium has never been produced in gram quantities due to its difficult production. Mendelevium is not used widely and has few applications beyond nuclear research. It is a solid metal at room temperature and it has a melting point of 827°c predicted, the boiling point is unknown.

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FAQ's

What is the Melting Point for Mendelevium?

Mendelevium has a Melting Point of 827°F, meaning at 827°F it will turn to a liquid.

What is the Boiling Point for Mendelevium?

Mendelevium has a Boiling Point of °F, meaning at °F it will turn to a Gas.

What is the Electronegativity of Mendelevium?

Mendelevium's Electronegativty is 1.3. Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.

What is the Heat of Vaporization of Mendelevium?

Mendelevium has a Heat of Vaporization of kJ/mol.

Uses

It has no significant commercial applications.

Sources

Made by bombarding einsteinium with helium ions.

101
Protons
101
Electrons
157
Neutrons

Md

Element Symbol
Md
Atomic Weight
258
Atomic Number
101
State
Solid
Melting Point
Unknown
827
°C
Boiling Point
Unknown
°C
Heat of Vaporization
Unknown
kJ/mol
Crystal Structure
Unknown
Thermoconductivity
0.1
Unknown
W/cmK
Shells
2,8,18,32,31,8,2
Group
Actinide
Period
7
Block
F Block
Orbitals
[Rn] 5f13 7s2
Coefficient of Thermal Expansion
--
Covalent Radius
--
Density at 293K
--
Electrical Conductivity
--
First Ionization Potential
6.58 V
Second Ionization Potential
--
Third Ionization Potential
--
Ionic Radius
--
Oxydation States
2,3
Lattice Parameter
--
Lattice Parameter 2
--
Lattice Parameter 3
--
Pronounced

men-deh-LEE-vi-em

Discovered by

G.T.Seaborg, S.G.Tompson, A.Ghiorso, K.Street Jr.

Discovery date

1955

Orbital configuration
2,8,18,32,31,8,2

Download the Periodic Table

Explore Other Actinides

262
103

Lr

Lawrencium
257
100

Fm

Fermium
244
94

Pu

Plutonium
251
98

Cf

Californium
238.029
92

U

Uranium
243
95

Am

Americium
231.036
91

Pa

Protactinium
252
99

Es

Einsteinium
247
96

Cm

Curium
237
93

Np

Neptunium
232.038
90

Th

Thorium
247
97

Bk

Berkelium
227
89

Ac

Actinium
259
102

No

Nobelium
The actinide series contains 15 metallic elements from number 89 (actinium) to 103 (lawrencium). They are located in group 3 in the periodic table.
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102