Element 73 of Periodic table is
Tantalum with atomic number 73,
atomic weight 180.9479.
Tantalum, symbol Ta, has a
Body Centered Cubic structure and Gray color.
Tantalum is a transition metal element.
Know everything about Tantalum Facts, Physical Properties, Chemical
Properties, Electronic configuration, Atomic and Crystal Structure.
Tantalum is a chemical element with symbol Ta and atomic number 73. Previously known as tantalium, its name comes from Tantalus, an antihero from Greek mythology. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant.
Read key information and facts about element Tantalum
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
73 to find Tantalum 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 Tantalum on periodic
table look for cross section of group 5 and period
6 in the modern periodic table.
Interactive Periodic Table to Understand
and Learn Cool Trends
The element Tantalum was discovered by Anders Gustaf Ekeberg in year
1802 in Sweden
derived its name from King Tantalus, father of Niobe from Greek mythology
The table below shows the abundance of Tantalum in Universe, Sun, Meteorites,
Earth's Crust, Oceans and Human Body.
The solid state structure of Tantalum 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.
Tantalum atoms have 73 electrons and
the electronic shell structure is [2, 8, 18, 32, 11, 2] with Atomic Term Symbol (Quantum Numbers) 4F3/2.
Shell Structure of Tantalum - Electrons per energy
The ground state electronic configuration of Neutral Tantalum atom is
[Xe] 4f14 5d3 6s2.
The portion of Tantalum 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 4f14 5d3 6s2, electrons in
the outermost shell that determine the chemical properties of the element.
Complete ground state electronic configuration for the Tantalum atom, Unabbreviated electronic configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d3 6s2
Tantalum atomic radius is 200 pm, while it's covalent radius is 138 pm.
The electron affinity of Tantalum is 31 kJ/mol
Refer to table below for Ionization energies of Tantalum
Refer to below table for Tantalum Physical Properties
Tantalum is Conductor of electricity. Refer to
below for the Electrical properties of Tantalum
Refer to table below for Thermal properties of Tantalum
Isotopes of rhodium. Naturally occurring Tantalum has
1 stable isotope -
List of unique identifiers to search the element in various chemical registry databases