
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.
H | He | ||||||||||||||||
Li | Be | B | C | N | O | F | Ne | ||||||||||
Na | Mg | Al | Si | P | S | Cl | Ar | ||||||||||
K | Ca | Sc | Ti | V | Cr | Mn | Fe | Co | Ni | Cu | Zn | Ga | Ge | As | Se | Br | Kr |
Rb | Sr | Y | Zr | Nb | Mo | Tc | Ru | Rh | Pd | Ag | Cd | In | Sn | Sb | Te | I | Xe |
Cs | Ba | La* | Hf | Ta | W | Re | Os | Ir | Pt | Au | Hg | Tl | Pb | Bi | Po | At | Rn |
Fr | Ra | Ac** | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og |
*Ce | Pr | Nd | Pm | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | ||||
**Th | Pa | U | Np | Pu | Am | Cm | Bk | Cf | Es | Fm | Md | No | Lr |
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.
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