Technetium element (Tc) is in group 7 and period 5 of a periodic table. Technetium is in the d-block and it is classified as a transition element on the periodic table.
There is a lot more information related to technetium which is mentioned in the Information Table given below.
So let’s dive right into it!
Table of contents
- Technetium element (Information Table)
- Technetium element in Periodic table
- Facts about Technetium
- Properties of Technetium
- Uses of Technetium
Technetium Element (Information Table)
The important data related to technetium element is given in the table below.
|Appearance of technetium||Silvery gray metallic appearance|
|Atomic number of technetium||43|
|Symbol of technetium||Tc|
|Atomic mass of technetium (most stable isotope)||98 u|
|Protons, Neutrons & Electrons in technetium||Protons: 43, Neutrons: 55, Electrons: 43|
|State of technetium (at STP)||Solid|
|Group number of technetium in periodic table||7|
|Period number of technetium in periodic table||5|
|Block of technetium in periodic table||d-block|
|Category of technetium||Transition metal|
|Bohr model or Electrons per shell or Electrons arrangement in technetium||2, 8, 18, 13, 2|
|Electron configuration of technetium||[Kr] 4d5 5s2|
|Orbital diagram of technetium|
|Electronegativity of technetium (on pauling scale)||1.9|
|Atomic radius of technetium (van der Waals radius)||209 picometers|
|Density of technetium||11.5 g/cm3|
|1st ionization energy of technetium||7.28 eV|
|Melting point of technetium||2430 K or 2157 °C or 3915 °F|
|Boiling point of technetium||4538 K or 4265 °C or 7709 °F|
|Crystal structure of technetium||Hexagonal Close Packing (HCP)|
|Discovery of technetium||By Carlo Perrier and Emilio Segrè in 1973|
Also see: Interactive Periodic Table (It has rotating bohr models as well as many other details of all the 118 elements in a single periodic table).
Technetium element in Periodic table
The Technetium element (Tc) has the atomic number 43 and is located in group 7 and period 5. Technetium is a metal and it is classified as a transition element.
Click on above elements in the periodic table to see their information.
Facts about technetium
Here are a few interesting facts about technetium element.
- The name “Technetium” came from the Greek word “technetos”, which means artificial.
- In the beginning, the name of the element was masurium, but later on it was named technetium.
- Technetium is very rare and it is believed to be present in different types of stars.
- Technetium is an artificial element that is prepared by humans in a laboratory.
- Technetium is the 1st laboratory made element on the periodic table.
Properties of technetium
Here is a list of some physical properties and chemical properties of technetium.
Physical properties of technetium
- Technetium has a silvery gray metallic appearance.
- The most stable isotope of technetium has an atomic mass of 98 u and its density is 11.5 g/cm3.
- The melting point and boiling point of technetium is 2430 K and 4538 K respectively.
- Technetium has a HCP crystal structure.
Chemical properties of technetium
- The electron configuration of technetium is [Kr] 4d5 5s2, and it has incomplete d-orbitals.
- Technetium is not soluble in HCl, but is soluble in HNO3 as well as concentrated H2SO4.
- The common oxidation states of technetium are +7, +5 and +4.
- Technetium is an artificially made element and it has some isotopes whose half-life is only a few hours and some isotopes have a half-life of 200,000 years to over a million years.
Uses of technetium
Here are some uses of the technetium element.
- Technetium can be used as a superconductor at the temperature below 11 K.
- Small amount of technetium is also added to steel manufacturing, which helps steel from corrosion.
- The isotope of technetium (i.e 99Tc) is used in medical radioactive isotope tests.
- Technetium – Element information, properties and uses | Periodic Table. (n.d.). Technetium – Element Information, Properties and Uses | Periodic Table. https://www.rsc.org/periodic-table/element/43/technetium
- It’s Elemental – The Element Technetium. (n.d.). It’s Elemental – the Element Technetium. https://education.jlab.org/itselemental/ele043.html
- Armstrong, J. T. (2008, October 16). Technetium: The Element That Was Discovered Twice. NIST. https://www.nist.gov/publications/technetium-element-was-discovered-twice
- Radionuclide Basics: Technetium-99 | US EPA. (2015, April 14). US EPA. https://www.epa.gov/radiation/radionuclide-basics-technetium-99
- Hackney, J. C. (1951, April). Technetium—Element 43. Journal of Chemical Education, 28(4), 186. https://doi.org/10.1021/ed028p186
- C&EN: IT’S ELEMENTAL: THE PERIODIC TABLE – TECHNETIUM. (n.d.). C&EN: IT’S ELEMENTAL: THE PERIODIC TABLE – TECHNETIUM. https://pubsapp.acs.org/cen/80th/technetium.html?
- Periodic Table of Elements: Los Alamos National Laboratory. (n.d.). Periodic Table of Elements: Los Alamos National Laboratory. https://periodic.lanl.gov/43.shtml
- Technetium | Tc | ChemSpider. (n.d.). Technetium | Tc | ChemSpider. http://www.chemspider.com/Chemical-Structure.22396.html?rid=17ef18ed-cac1-4c1a-8948-a4c6c539087d
- Prohaska, T., et al. (2022, May 1). Standard atomic weights of the elements 2021 (IUPAC Technical Report). Pure and Applied Chemistry, 94(5), 573–600. https://doi.org/10.1515/pac-2019-0603
- Haynes, W. M. (Ed.). (2014, June 4). CRC Handbook of Chemistry and Physics. https://doi.org/10.1201/b17118
- Kaye, G W.C., & Laby, T H. Tables of physical and chemical constants. 15th Edition. United States.
- Sansonetti, J. E., & Martin, W. C. (2005, December). Handbook of Basic Atomic Spectroscopic Data. Journal of Physical and Chemical Reference Data, 34(4), 1559–2259. https://doi.org/10.1063/1.1800011
- Bondi, A. (1964, March). van der Waals Volumes and Radii. The Journal of Physical Chemistry, 68(3), 441–451. https://doi.org/10.1021/j100785a001
- Holden, et al. (2018, December 1). IUPAC Periodic Table of the Elements and Isotopes (IPTEI) for the Education Community (IUPAC Technical Report). Pure and Applied Chemistry, 90(12), 1833–2092. https://doi.org/10.1515/pac-2015-0703
- Zhang, et al. (2011, January 11). Corrected Values for Boiling Points and Enthalpies of Vaporization of Elements in Handbooks. Journal of Chemical & Engineering Data, 56(2), 328–337. https://doi.org/10.1021/je1011086
Jay is an educator and has helped more than 100,000 students in their studies by providing simple and easy explanations on different science-related topics. With a desire to make learning accessible for everyone, he founded Knords Learning, an online chemistry learning platform that provides students with easily understandable explanations.
Read more about our Editorial process.