Element 72 of Periodic table is
Hafnium with atomic number 72,
atomic weight 178.49.
Hafnium, symbol Hf, has a
Simple Hexagonal structure and Gray color.
Hafnium is a transition metal element.
Know everything about Hafnium Facts, Physical Properties, Chemical
Properties, Electronic configuration, Atomic and Crystal Structure.
Hafnium is a chemical element with symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in zirconium minerals. Its existence was predicted by Dmitri Mendeleev in 1869, though it was not identified until 1923, making it the penultimate stable element to be discovered (rhenium was identified two years later).
Read key information and facts about element Hafnium
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
72 to find Hafnium 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 Hafnium on periodic
table look for cross section of group 4 and period
6 in the modern periodic table.
Interactive Periodic Table to Understand
and Learn Cool Trends
The element Hafnium was discovered by Dirk Coster in year
1923 in Denmark
derived its name from Hafnia, the New Latin name for Copenhagen
The table below shows the abundance of Hafnium in Universe, Sun, Meteorites,
Earth's Crust, Oceans and Human Body.
The solid state structure of Hafnium 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.
Hafnium atoms have 72 electrons and
the electronic shell structure is [2, 8, 18, 32, 10, 2] with Atomic Term Symbol (Quantum Numbers) 3F2.
Shell Structure of Hafnium - Electrons per energy
The ground state electronic configuration of Neutral Hafnium atom is
[Xe] 4f14 5d2 6s2.
The portion of Hafnium 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 5d2 6s2, electrons in
the outermost shell that determine the chemical properties of the element.
Complete ground state electronic configuration for the Hafnium atom, Unabbreviated electronic configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d2 6s2
Hafnium atomic radius is 208 pm, while it's covalent radius is 150 pm.
The electron affinity of Hafnium is 0 kJ/mol
Refer to table below for Ionization energies of Hafnium
Refer to below table for Hafnium Physical Properties
Hafnium is Conductor of electricity. Refer to
below for the Electrical properties of Hafnium
Refer to table below for Thermal properties of Hafnium
Isotopes of rhodium. Naturally occurring Hafnium has
5 stable isotope -
176Hf, 177Hf, 178Hf, 179Hf, 180Hf.
List of unique identifiers to search the element in various chemical registry databases