Tc Technetium – Element Information, Facts, Properties, Trends,Uses, Comparison with other elements

Technetium History

The element Technetium was discovered by Emilio Segrè in year 1937 in Italy . Technetium derived its name from the Greek tekhnètos meaning 'artificial'

Technetium Presence: Abundance in Nature and Around Us

The table below shows the abundance of Technetium in Universe, Sun, Meteorites, Earth's Crust, Oceans and Human Body.

Crystal Structure of Technetium

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.

Unit Cell Parameters

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 ( x_i, y_i, z_i) 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.

Space Group Name	P63/mmc
Space Group Number	194
Crystal Structure	Simple Hexagonal

Technetium Atomic and Orbital Properties

Technetium atoms have 43 electrons and the electronic shell structure is [2, 8, 18, 13, 2] with Atomic Term Symbol (Quantum Numbers) ⁶S_5/2.

Atomic Number	43
Number of Electrons (with no charge)	43
Number of Protons	43
Mass Number	98
Number of Neutrons	55
Shell structure (Electrons per energy level)	[2, 8, 18, 13, 2]
Electron Configuration	[Kr] 4d5 5s2
Valence Electrons	4d5 5s2
Oxidation State	-3;-1 1;2;3;4;5;6;7
Atomic Term Symbol (Quantum Numbers)	6S5/2

Shell Structure of Technetium - Electrons per energy level

n		s	p	d	f
1	K	2
2	L	2	6
3	M	2	6	10
4	N	2	6	5
5	O	2

Ground State Electronic Configuration of Technetium - neutral Technetium atom

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.

Unabbreviated electronic configuration of neutral Technetium

Complete ground state electronic configuration for the Technetium atom, Unabbreviated electronic configuration

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d5 5s2

Atomic Structure of Technetium

Technetium atomic radius is 183 pm, while it's covalent radius is 156 pm.

Atomic Spectrum of Technetium

Technetium Chemical Properties: Technetium Ionization Energies and electron affinity

The electron affinity of Technetium is 53 kJ/mol

Ionization Energy of Technetium

Refer to table below for Ionization energies of Technetium

Technetium Physical Properties

Refer to below table for Technetium Physical Properties

Elastic Properties

Hardness of Technetium - Tests to Measure of Hardness of Element

Technetium Electrical Properties

Technetium is Conductor of electricity. Refer to table below for the Electrical properties of Technetium

Technetium Heat and Conduction Properties

Technetium Magnetic Properties

Optical Properties of Technetium

Acoustic Properties of Technetium

Technetium Thermal Properties - Enthalpies and thermodynamics

Refer to table below for Thermal properties of Technetium

Enthalpies of Technetium

Technetium Isotopes - Nuclear Properties of Technetium

Isotopes of rhodium. Naturally occurring Technetium has 1 stable isotope - None.

Regulatory and Health - Health and Safety Parameters and Guidelines

Database Search

List of unique identifiers to search the element in various chemical registry databases