Elements
96

Cm

Curium

Curium (Cm) is a silvery-white colored radioactive metal that has the atomic number 96 in the periodic table. It is an Actinoid Metal with the symbol Cm.

Curium was first synthesised by Glenn T. Seaborg, Ralph James, and Albert Ghiorso in 1944 at UC Berkeley. In their experiment the element plutonium was bombarded wth a helium nucleus causing nuclear decay producing Curium. It draws its name from Marie and Pieree Curie who are noted for their work with radioactivity. Curium has odd magnetic properties and can exhibit ferromagnetism when cooled. Its oxides also will fluoresce when put under ultraviolet light. Curium’s longest half life is 15.6 million years and it is not found in the earths crust. It occurs in nuclear fuel and also can be detected after nuclear weapons have been used. Curium is used as a radionuclide and also in x-ray machines. It is a solid metal at room temperature and it has a melting point of 1340°c and a boiling point of 3110°c.

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FAQ's

What is the Melting Point for Curium?

Curium has a Melting Point of 1340°F, meaning at 1340°F it will turn to a liquid.

What is the Boiling Point for Curium?

Curium has a Boiling Point of 3110°F, meaning at 3110°F it will turn to a Gas.

What is the Electronegativity of Curium?

Curium's Electronegativty is 1.28. Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.

What is the Heat of Vaporization of Curium?

Curium has a Heat of Vaporization of kJ/mol.

Uses

It has no significant commercial applications.

Sources

Made by bombarding plutonium with helium ions. So radioactive it glows in the dark.

96
Protons
96
Electrons
151
Neutrons

Cm

Element Symbol
Cm
Atomic Weight
247
Atomic Number
96
State
Solid
Melting Point
Unknown
1340
°C
Boiling Point
3110
Unknown
°C
Heat of Vaporization
Unknown
kJ/mol
Crystal Structure
Hexagonal
Thermoconductivity
0.1
Unknown
W/cmK
Shells
2,8,18,32,25,9,2
Group
Actinide
Period
7
Block
F Block
Orbitals
[Rn] 5f7 6d1 7s2
Coefficient of Thermal Expansion
--
Covalent Radius
--
Density at 293K
13.5 g/cm³
Electrical Conductivity
--
First Ionization Potential
6.02 V
Second Ionization Potential
--
Third Ionization Potential
--
Ionic Radius
--
Oxydation States
(3),4
Lattice Parameter
--
Lattice Parameter 2
--
Lattice Parameter 3
--
Pronounced

KYOOR-i-em

Discovered by

G.T.Seaborg, R.A.James, A.Ghiorso

Discovery date

1944

Orbital configuration
2,8,18,32,25,9,2

Download the Periodic Table

Explore Other Actinides

237
93

Np

Neptunium
252
99

Es

Einsteinium
231.036
91

Pa

Protactinium
251
98

Cf

Californium
244
94

Pu

Plutonium
258
101

Md

Mendelevium
259
102

No

Nobelium
257
100

Fm

Fermium
238.029
92

U

Uranium
247
97

Bk

Berkelium
227
89

Ac

Actinium
232.038
90

Th

Thorium
262
103

Lr

Lawrencium
243
95

Am

Americium
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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