Einsteinium (Es): Properties, Uses and Facts in 3D

Einsteinium is element 99 on the periodic table, an actinide, so it is a metal. At room temperature it is a solid. Open it in the 3D Periodic Table to spin its tile, see its electron shells and read its story.

Open Einsteinium in 3D All 118 elements

Einsteinium (Es) shown in the VisionVix 3D Periodic Table — Einsteinium in the VisionVix 3D Periodic Table. Click the picture to open it live.

Einsteinium quick facts

Atomic number	99
Symbol	Es
Atomic mass	252
Category	Actinide
Series and period	Actinides, period 7
Block	f-block
State at room temperature	Solid
Electron configuration	[Rn] 5f¹¹ 7s²
Electrons per shell	2, 8, 18, 32, 29, 8, 2
Discovered	1952, Ghiorso

What is einsteinium used for?

Scientific research only
Produced in microgram quantities
Parent nuclide studies

Interesting facts about einsteinium

Discovered in fallout from the first hydrogen bomb test (Ivy Mike, 1952). Classified for years
Named after Albert Einstein
Only microgram quantities have ever been produced

Einsteinium was discovered in 1952 by Ghiorso in the United States.

Where einsteinium sits on the periodic table

Einsteinium is in the actinide series (period 7). Tap any element to open its page.

HHe Li BeB C N O F Ne Na MgAl Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs BaHf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr RaRf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts OgLa Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb LuAc Th Pa U Np Pu Am Cm Bk CfEsFm Md No Lr

Previous element98. Californium Next element100. Fermium

Other actinides

89Actinium (Ac)90Thorium (Th)91Protactinium (Pa)92Uranium (U)93Neptunium (Np)94Plutonium (Pu)95Americium (Am)96Curium (Cm)

Einsteinium questions

What is the atomic number of einsteinium?

Einsteinium has atomic number 99, so every einsteinium atom has 99 protons in its nucleus. Its symbol is Es and its atomic mass is 252.

Is einsteinium a metal?

Einsteinium is a metal. On the periodic table it is grouped as an actinide, found in the actinide series (period 7).

What is the electron configuration of einsteinium?

The electron configuration of einsteinium is [Rn] 5f¹¹ 7s². Its electrons sit in 7 shells: 2, 8, 18, 32, 29, 8, 2.

What is einsteinium used for?

Einsteinium is used for scientific research only, produced in microgram quantities and parent nuclide studies.

Who discovered einsteinium?

Einsteinium was discovered in 1952 by Ghiorso in the United States.

The 3D Periodic Table is made by Julian Neagu, a solo founder in London, as part of VisionVix Simulators. It is free to use in the browser on desktop and phone, with no sign-up.