Element 43 of Periodic table is Technetium with atomic number 43, atomic weight 98. Technetium, symbol Tc, has a Simple Hexagonal structure and Silver color. Technetium is a transition metal element. Know everything about Technetium Facts, Physical Properties, Chemical Properties, Electronic configuration, Atomic and Crystal Structure.
Technetium (/tɛkˈniːʃiəm/) is a chemical element with symbol Tc and atomic number 43. It is the element with the lowest atomic number in the periodic table that has no stable isotopes:every form of it is radioactive. Nearly all technetium is produced synthetically, and only minute amounts are found in nature.
Read key information and facts about element Technetium
Explore our interactive periodic table
Periodic table is arranged by atomic number, number of protons in the nucleus which is same as number of electrons. 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 43 to find Technetium 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 Technetium on periodic table look for cross section of group 7 and period 5 in the modern periodic table.
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The element Technetium was discovered by Emilio Segrè in year 1937 in Italy . Technetium derived its name from the Greek tekhnètos meaning 'artificial'
The table below shows the abundance of Technetium in Universe, Sun, Meteorites, Earth's Crust, Oceans and Human Body.
The solid state structure of Technetium is Simple Hexagonal.
The Crystal structure can be described in terms of its unit Cell. The unit Cells repeats itself in three dimensional space to form the structure.
The unit cell is represented in terms of its lattice parameters, which are the lengths of the cell edges 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.
Technetium atoms have 43 electrons and the electronic shell structure is [2, 8, 18, 13, 2] with Atomic Term Symbol (Quantum Numbers) 6S5/2.
Shell Structure of Technetium - Electrons per energy level
The ground state electronic configuration of Neutral Technetium atom is [Kr] 4d5 5s2. The portion of Technetium configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Kr]. 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 4d5 5s2, electrons in the outermost shell that determine the chemical properties of the element.
Complete ground state electronic configuration for the Technetium atom, Unabbreviated electronic configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d5 5s2
Technetium atomic radius is 183 pm, while it's covalent radius is 156 pm.
183 pm (1.83 Å)
The electron affinity of Technetium is 53 kJ/mol
Refer to table below for Ionization energies of Technetium
Refer to below table for Technetium Physical Properties
Technetium is Conductor of electricity. Refer to table below for the Electrical properties of Technetium
Refer to table below for Thermal properties of Technetium
Isotopes of rhodium. Naturally occurring Technetium has 1 stable isotope - None.
List of unique identifiers to search the element in various chemical registry databases