Promethium element (Pm) is in period 6 of a periodic table. Promethium is in the f-block and it is classified as a lanthanide on the periodic table.
There is a lot more information related to promethium which is mentioned in the Information Table given below.
So let’s dive right into it!
Table of contents
- Promethium element (Information Table)
- Promethium element in Periodic table
- Facts about Promethium
- Properties of Promethium
- Uses of Promethium
Promethium Element (Information Table)
The important data related to promethium element is given in the table below.
|Appearance of promethium||Metallic appearance|
|Atomic number of promethium||61|
|Symbol of promethium||Pm|
|Atomic mass of promethium (most stable isotope)||145 u|
|Protons, Neutrons & Electrons in promethium||Protons: 61, Neutrons: 84, Electrons: 61|
|State of promethium (at STP)||Solid|
|Period number of promethium in periodic table||6|
|Block of promethium in periodic table||f-block|
|Category of promethium||Inner transition metals|
|Bohr model or Electrons per shell or Electrons arrangement in promethium||2, 8, 18, 23, 8, 2|
|Electron configuration of promethium||[Xe] 4f5 6s2|
|Orbital diagram of promethium|
|Atomic radius of promethium (van der Waals radius)||236 picometers|
|Density of promethium||7.26 g/cm3|
|1st ionization energy of promethium||5.55 eV|
|Main isotope of promethium||145Pm and 147Pm|
|Melting point of promethium||1315 K or 1042 °C or 1908 °F|
|Boiling point of promethium||3273 K or 3000 °C or 5432 °F|
|Crystal structure of promethium||Double Hexagonal Close Packing (DHCP)|
|Discovery of promethium||By Lawrence Glendenin, Jacob Marinsky, Charles Coryell (in 1945)|
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).
Promethium element in Periodic table
The Promethium element (Pm) has the atomic number 61 and is located in period 6. Promethium is a metal and it is classified as a lanthanide group element.
Facts about promethium
Here are a few interesting facts about the promethium element.
- Lawrence Glendenin, Jacob Marinsky and Charles Coryell discovered promethium in 1945.
- Charles Coryell’s wife had suggested the name “promethium” for this element.
- If we talk about the discovery of only rare earth metals, then promethium was the last discovered rare earth metal.
- Promethium is usually obtained from uranium fission reactions.
Properties of promethium
Here is a list of some physical properties and chemical properties of promethium.
Physical properties of promethium
- Promethium has a silvery gray metallic appearance.
- The salts of promethium glow with a bluish or greenish light in the dark.
- There are two naturally occurring isotopes of promethium and they are 145Pm and 147Pm. These isotopes are very rare in quantity.
- Promethium has a DHCP (double hexagonal close packed) crystal structure.
- The melting point and boiling point of promethium is 1315 K and 3273 K respectively.
Chemical properties of promethium
- The isotopes of promethium undergo beta-decay and they are radioactive isotopes.
- Promethium has many oxidation states, but the most common oxidation state is +3.
- Promethium has an electron configuration of [Xe] 6s2 4f5 and it is classified as a f-block element on the periodic table because of the last electron entering in the f-orbitals.
Uses of promethium
Here are some uses of the promethium element.
- Promethium is available in very rare quantities and it is generally used for research work in chemistry.
- Promethium can be used in medical devices.