Elements
103

Lr

Lawrencium

Lawrencium (Lr) is a silvery-white colored radioactive metal that has the atomic number 103 in the periodic table. It is an Actinoid Metal with the symbol Lr.

Lawrencium is a synthetic element. It is named after Ernest Lawrence, the inventor of the cyclotron, a particle accelerator used to combine radioactive elements. Lawrencium is the final elements of the actinide series and it can only be produced in particle accelerators, it does not exist in nature. Much like Nobelium, Lawrencium’s discovery was claimed by many different groups. Lawrencium’s discovery was credited by IUPAC to the Lawrence Berkelely laboratory in 1971 but in 1992 it awarded joint discovery to the Dubna research group in Russia. It is a solid metal at room temperature and it has a melting point of 1627°c predicted, the boiling point is unknown.

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FAQ's

What is the Melting Point for Lawrencium?

Lawrencium has a Melting Point of 1627°F, meaning at 1627°F it will turn to a liquid.

What is the Boiling Point for Lawrencium?

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

What is the Electronegativity of Lawrencium?

Lawrencium'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 Lawrencium?

Lawrencium has a Heat of Vaporization of kJ/mol.

Uses

It has no significant commercial applications.

Sources

Produced by bombarding californium with boron ions.

103
Protons
103
Electrons
159
Neutrons

Lr

Element Symbol
Lr
Atomic Weight
262
Atomic Number
103
State
Solid
Melting Point
Unknown
1627
°C
Boiling Point
Unknown
°C
Heat of Vaporization
Unknown
kJ/mol
Crystal Structure
Unknown
Thermoconductivity
0.1
Unknown
W/cmK
Shells
2,8,18,32,32,9,2
Group
Actinide
Period
7
Block
D Block
Orbitals
[Rn] 5f14 6d1 7s2
Coefficient of Thermal Expansion
--
Covalent Radius
--
Density at 293K
--
Electrical Conductivity
--
First Ionization Potential
--
Second Ionization Potential
--
Third Ionization Potential
--
Ionic Radius
--
Oxydation States
3
Lattice Parameter
--
Lattice Parameter 2
--
Lattice Parameter 3
--
Pronounced

lor-ENS-i-em

Discovered by

A.Ghiorso, T.Sikkeland, A.E.Larsh, R.M.Latimer

Discovery date

1961

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

Download the Periodic Table

Explore Other Actinides

244
94

Pu

Plutonium
247
97

Bk

Berkelium
238.029
92

U

Uranium
259
102

No

Nobelium
252
99

Es

Einsteinium
257
100

Fm

Fermium
231.036
91

Pa

Protactinium
227
89

Ac

Actinium
237
93

Np

Neptunium
251
98

Cf

Californium
258
101

Md

Mendelevium
247
96

Cm

Curium
232.038
90

Th

Thorium
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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Nobelium

102
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Rutherfordium

104