Element 68 of Periodic table is
Erbium with atomic number 68,
atomic weight 167.259.
Erbium, symbol Er, has a
Simple Hexagonal structure and Silver color.
Erbium is a lanthanide element.
Know everything about Erbium Facts, Physical Properties, Chemical
Properties, Electronic configuration, Atomic and Crystal Structure.
Erbium is a chemical element in the lanthanide series, with symbol Er and atomic number 68. A silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements on Earth. As such, it is a rare earth element which is associated with several other rare elements in the mineral gadolinite from Ytterby in Sweden, where yttrium, ytterbium, and terbium were discovered.
Read key information and facts about element Erbium
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
68 to find Erbium 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 Erbium on periodic
table look for cross section of group N/A and period
6 in the modern periodic table.
Interactive Periodic Table to Understand
and Learn Cool Trends
The element Erbium was discovered by Carl Gustaf Mosander in year
1842 in Sweden
derived its name from Ytterby, Sweden
The table below shows the abundance of Erbium in Universe, Sun, Meteorites,
Earth's Crust, Oceans and Human Body.
The solid state structure of Erbium is Simple Hexagonal.
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.
Erbium atoms have 68 electrons and
the electronic shell structure is [2, 8, 18, 30, 8, 2] with Atomic Term Symbol (Quantum Numbers) 3H6.
Shell Structure of Erbium - Electrons per energy
The ground state electronic configuration of Neutral Erbium atom is
[Xe] 4f12 6s2.
The portion of Erbium configuration that is equivalent to the noble gas of
the preceding period, is abbreviated as [Xe]. 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 4f12 6s2, electrons in
the outermost shell that determine the chemical properties of the element.
Complete ground state electronic configuration for the Erbium atom, Unabbreviated electronic configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f12 6s2
Erbium atomic radius is 226 pm, while it's covalent radius is N/A.
The electron affinity of Erbium is 50 kJ/mol
Refer to table below for Ionization energies of Erbium
Refer to below table for Erbium Physical Properties
Erbium is Conductor of electricity. Refer to
below for the Electrical properties of Erbium
Refer to table below for Thermal properties of Erbium
Isotopes of rhodium. Naturally occurring Erbium has
6 stable isotope -
162Er, 164Er, 166Er, 167Er, 168Er, 170Er.
List of unique identifiers to search the element in various chemical registry databases