Element 27 of Periodic table is
Cobalt with atomic number 27,
atomic weight 58.9332.
Cobalt, symbol Co, has a
Simple Hexagonal structure and Gray color.
Cobalt is a transition metal element.
Know everything about Cobalt Facts, Physical Properties, Chemical
Properties, Electronic configuration, Atomic and Crystal Structure.
Cobalt is a chemical element with symbol Co and atomic number 27. Like nickel, cobalt in the Earth's crust is found only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.
Read key information and facts about element Cobalt
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
27 to find Cobalt 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 Cobalt on periodic
table look for cross section of group 9 and period
4 in the modern periodic table.
Interactive Periodic Table to Understand
and Learn Cool Trends
The element Cobalt was discovered by Georg Brandt in year
1735 in Sweden
derived its name from the German word Kobold, meaning 'goblin'
The table below shows the abundance of Cobalt in Universe, Sun, Meteorites,
Earth's Crust, Oceans and Human Body.
The solid state structure of Cobalt 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.
Cobalt atoms have 27 electrons and
the electronic shell structure is [2, 8, 15, 2] with Atomic Term Symbol (Quantum Numbers) 4F9/2.
Shell Structure of Cobalt - Electrons per energy
The ground state electronic configuration of Neutral Cobalt atom is
[Ar] 3d7 4s2.
The portion of Cobalt configuration that is equivalent to the noble gas of
the preceding period, is abbreviated as [Ar]. 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 3d7 4s2, electrons in
the outermost shell that determine the chemical properties of the element.
Complete ground state electronic configuration for the Cobalt atom, Unabbreviated electronic configuration
1s2 2s2 2p6 3s2 3p6 3d7 4s2
Cobalt atomic radius is 152 pm, while it's covalent radius is 126 pm.
The electron affinity of Cobalt is 63.7 kJ/mol
Refer to table below for Ionization energies of Cobalt
Refer to below table for Cobalt Physical Properties
Cobalt is Conductor of electricity. Refer to
below for the Electrical properties of Cobalt
Refer to table below for Thermal properties of Cobalt
Isotopes of rhodium. Naturally occurring Cobalt has
1 stable isotope -
List of unique identifiers to search the element in various chemical registry databases