Atomic Number of Promethium

Promethium Atomic Number

Atomic Number of Promethium is 61.

Chemical symbol for Promethium is Pm. Number of protons in Promethium is 61. Atomic weight of Promethium is 145 u or g/mol. Melting point of Promethium is 1080 °C and its the boiling point is 2730 °C.

» Boiling Point » Melting Point » Abundant » State at STP » Discovery Year

About Promethium

Promethium is an artificially produced chemical element which is a radioactive metal. The name of this element originates from the name of the ancient Greek god Prometheus who stole fire from Gods and gave it to humans. This element is mostly used for research or in some industries related to nuclear power and radioactivity. Promethium can be used in atomic batteries, illuminated clocks, or in special x-ray devices. It has no biological role and is harmful to all living organisms. It was discovered that there is an abundance of this element in one star system in Andromeda galaxy.

Properties of Promethium Element

Atomic Number (Z)61
Atomic SymbolPm
Atomic Weight145 u
Density7.26 g/cm3
Melting Point (K)1315 K
Melting Point (℃)1080 °C
Boiling Point (K)3273 K
Boiling Point (℃)2730 °C
Heat Capacity
Abundance2×10−19 mg/kg
State at STPSolid
Electronegativity (Pauling) χno data
Ionization Energy (eV)5.582
Atomic Radius185pm
Covalent Radiusno datapm
Valence Electrons2
Year of Discovery1945
DiscovererMarinsky and Glendenin

What is the Boiling Point of Promethium?

Promethium boiling point is 2730 °C. Boiling point of Promethium in Kelvin is 3273 K.

What is the Melting Point of Promethium?

Promethium melting point is 1080 °C. Melting point of Promethium in Kelvin is 1315 K.

How Abundant is Promethium?

Abundant value of Promethium is 2×10−19 mg/kg.

What is the State of Promethium at Standard Temperature and Pressure (STP)?

State of Promethium is Solid at standard temperature and pressure at 0℃ and one atmosphere pressure.

When was Promethium Discovered?

Promethium was discovered in 1945.