Element 56 of Periodic table is
Barium with atomic number 56,
atomic weight 137.327.
Barium, symbol Ba, has a
Body Centered Cubic structure and Silver color.
Barium is a alkaline earth metal element.
Trivial name of Barium is alkaline earth metals*.
Know everything about Barium Facts, Physical Properties, Chemical
Properties, Electronic configuration, Atomic and Crystal Structure.
Barium is a chemical element with symbol Ba and atomic number 56. It is the fifth element in Group 2, a soft silvery metallic alkaline earth metal. Because of its high chemical reactivity barium is never found in nature as a free element.
Read key information and facts about element Barium
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
56 to find Barium 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 Barium on periodic
table look for cross section of group 2 and period
6 in the modern periodic table.
Interactive Periodic Table to Understand
and Learn Cool Trends
The element Barium was discovered by Carl Wilhelm Scheele in year
1808 in United Kingdom
derived its name from the Greek barys, meaning 'heavy'
The table below shows the abundance of Barium in Universe, Sun, Meteorites,
Earth's Crust, Oceans and Human Body.
The solid state structure of Barium is Body 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.
Barium atoms have 56 electrons and
the electronic shell structure is [2, 8, 18, 18, 8, 2] with Atomic Term Symbol (Quantum Numbers) 1S0.
Shell Structure of Barium - Electrons per energy
The ground state electronic configuration of Neutral Barium atom is
The portion of Barium 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 6s2, electrons in
the outermost shell that determine the chemical properties of the element.
Complete ground state electronic configuration for the Barium atom, Unabbreviated electronic configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 6s2
Barium atomic radius is 253 pm, while it's covalent radius is 198 pm.
The electron affinity of Barium is 13.95 kJ/mol
Refer to table below for Ionization energies of Barium
Refer to below table for Barium Physical Properties
Barium is Conductor of electricity. Refer to
below for the Electrical properties of Barium
Refer to table below for Thermal properties of Barium
Isotopes of rhodium. Naturally occurring Barium has
7 stable isotope -
130Ba, 132Ba, 134Ba, 135Ba, 136Ba, 137Ba, 138Ba.
List of unique identifiers to search the element in various chemical registry databases
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