Element 99 of Periodic table is
Einsteinium with atomic number 99,
atomic weight 252.
Einsteinium, symbol Es, has a
Face Centered Cubic structure and unknown color.
Einsteinium is a actinide element.
Know everything about Einsteinium Facts, Physical Properties, Chemical
Properties, Electronic configuration, Atomic and Crystal Structure.
Einsteinium is a synthetic element with symbol Es and atomic number 99. It is the seventh transuranic element, and an actinide. Einsteinium was discovered as a component of the debris of the first hydrogen bomb explosion in 1952, and named after Albert Einstein.
Read key information and facts about element Einsteinium
Explore our interactive periodic table
Periodic table is arranged by atomic number, number of protons in the nucleus which is same as number of
The atomic number increases from left to right. Periodic table starts at top left ( Atomic number 1) and
ends at bottom right (atomic number 118). Therefore you can directly look for atomic number
99 to find Einsteinium on periodic table.
Another way to read periodic table and locate an element is by using group number (column)
and period number (row). To locate Einsteinium on periodic
table look for cross section of group N/A and period
7 in the modern periodic table.
Interactive Periodic Table to Understand
and Learn Cool Trends
The element Einsteinium was discovered by Lawrence Berkeley National Laboratory in year
1952 in United States
derived its name from Albert Einstein, physicist
The table below shows the abundance of Einsteinium in Universe, Sun, Meteorites,
Earth's Crust, Oceans and Human Body.
The solid state structure of Einsteinium is Face Centered Cubic.
The Crystal structure can be described in terms of its unit Cell. The unit Cells repeats itself in
dimensional space to form the structure.
The unit cell is represented in terms of its lattice parameters, which are the lengths of the cell
Lattice Constants (a, b and c)
and the angles between them Lattice Angles (alpha, beta and gamma).
The positions of the atoms inside the unit cell are described by the set of atomic positions (
xi, yi, zi) measured from a reference lattice point.
The symmetry properties of the crystal are described by the concept of space groups. All possible
symmetric arrangements of particles in three-dimensional space are described by the 230 space groups
(219 distinct types, or 230 if chiral copies are considered distinct.
Einsteinium atoms have 99 electrons and
the electronic shell structure is [2, 8, 18, 32, 29, 8, 2] with Atomic Term Symbol (Quantum Numbers) 5I15/2.
Shell Structure of Einsteinium - Electrons per energy
The ground state electronic configuration of Neutral Einsteinium atom is
[Rn] 5f11 7s2.
The portion of Einsteinium configuration that is equivalent to the noble gas of
the preceding period, is abbreviated as [Rn]. For atoms with many electrons, this
notation can become lengthy and so an abbreviated notation is used.This is important as it is
the Valence electrons 5f11 7s2, electrons in
the outermost shell that determine the chemical properties of the element.
Complete ground state electronic configuration for the Einsteinium atom, Unabbreviated electronic configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f11 7s2
Einsteinium atomic radius is N/A, while it's covalent radius is N/A.
The electron affinity of Einsteinium is N/A
Refer to table below for Ionization energies of Einsteinium
Refer to below table for Einsteinium Physical Properties
Einsteinium is N/A of electricity. Refer to
below for the Electrical properties of Einsteinium
Refer to table below for Thermal properties of Einsteinium
Isotopes of rhodium. Naturally occurring Einsteinium has
1 stable isotope -
List of unique identifiers to search the element in various chemical registry databases