Elements
99

Es

Einsteinium

Einsteinium (Es) is a silvery-white colored radioactive metal that has the atomic number 99 in the periodic table. It is an Actinoid Metal with the symbol Es.

Einsteinium is a paramagnetic metal and is highly radioactive. It glows visibly and releases a lot of heat during decay. Einsteinium was discovered as a component in the debir of the first hydrogen bomb in 1952and named after Albert Einstein. Einsteinium is a synthetic element created in laboratories and does not exist naturally as an element. It was identified by Albert Ghiorso in the fallout of the Ivy Mike nuclear weapon testing in the pacific ocean. The discovery of Einsteinium was kept a secret until 1955 due to the cold war and tension with the USSR. Einsteinium has no uses outside of nuclear research. It is a solid metal at room temperature and it has a melting point of 860°c and a boiling point of 996°c.

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FAQ's

What is the Melting Point for Einsteinium?

Einsteinium has a Melting Point of 860°F, meaning at 860°F it will turn to a liquid.

What is the Boiling Point for Einsteinium?

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

What is the Electronegativity of Einsteinium?

Einsteinium'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 Einsteinium?

Einsteinium has a Heat of Vaporization of kJ/mol.

Uses

It has no significant commercial applications.

Sources

Made by bombarding uranium with neutrons.

99
Protons
99
Electrons
153
Neutrons

Es

Element Symbol
Es
Atomic Weight
252
Atomic Number
99
State
Solid
Melting Point
Unknown
860
°C
Boiling Point
Unknown
°C
Heat of Vaporization
Unknown
kJ/mol
Crystal Structure
Unknown
Thermoconductivity
0.1
Unknown
W/cmK
Shells
2,8,18,32,29,8,2
Group
Actinide
Period
7
Block
F Block
Orbitals
[Rn] 5f11 7s2
Coefficient of Thermal Expansion
--
Covalent Radius
--
Density at 293K
--
Electrical Conductivity
--
First Ionization Potential
6.42 V
Second Ionization Potential
--
Third Ionization Potential
--
Ionic Radius
--
Oxydation States
(2),3
Lattice Parameter
--
Lattice Parameter 2
--
Lattice Parameter 3
--
Pronounced

ine-STINE-i-em

Discovered by

Argonne, Los Alamos, U of Calif

Discovery date

1952

Orbital configuration
2,8,18,32,29,8,2

Download the Periodic Table

Explore Other Actinides

238.029
92

U

Uranium
231.036
91

Pa

Protactinium
237
93

Np

Neptunium
247
96

Cm

Curium
247
97

Bk

Berkelium
259
102

No

Nobelium
258
101

Md

Mendelevium
244
94

Pu

Plutonium
251
98

Cf

Californium
243
95

Am

Americium
262
103

Lr

Lawrencium
257
100

Fm

Fermium
232.038
90

Th

Thorium
227
89

Ac

Actinium
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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