Siteseen Logo

The Element Francium


"The Atom"

Periodic Table Group and Classification of the of the Francium Element
Elements can be classified based on their physical states (States of Matter) e.g. gas, solid or liquid. This element is a solid. Francium is classified as an "Alkali Metal" and located in Group 1 elements of the Periodic Table.

An Element classified as an Alkali Metal is a very reactive metal that does not occur freely in nature. Alkali metals are soft, malleable, ductile, and are good conductors of heat and electricity. Nearly 75% of all the elements in the Periodic Table are classified as metals which are detailed in the List of Metals.

The Properties of the Francium Element
Symbol of Element : Fr
Atomic Number : 87
Atomic Mass: 223.0 amu
Melting Point: 27.0 C - 300.15 K
Boiling Point: 677.0 C - 950.15 K
Number of Protons/Electrons : 87
Number of Neutrons : 136
Crystal Structure: Cubic
Density @ 293 K
Color : Unknown

Definition of the Francium Element
An extremely unstable radioactive element of the alkali metals, produced artificially from actinum or thorium, having approximately 19 isotopes, the most stable of which is Fr 223 with a half-life of 21 minutes. It is the least electronegative of all the known elements. Francium occurs naturally to a very limited extent in uranium minerals. The Atomic Number of this element is 87 and the Element Symbol is Fr.

Origin / Meaning of the name Francium
The name originates from its country of origin, France, where the French physicist Marguerite Perey from the Curie Institute in Paris discovered it in 1939 in the alpha particle decay of actinium.

Facts about the History of the Discovery of Francium Element
Francium was discovered by Marguerite Perey of the Curie Institute in Paris in 1939.

History of the Periodic Table
Check out the brief History of the Periodic Table which details dates and the names of famous scientists and chemists who contributed to the development of the Periodic Table.

Occurrence of the Francium Element
Obtained from the decay of actinium
Naturally occurs in uranium minerals
Has the highest equivalent weight of any element
There are 33 known isotopes of francium

Abundance of Francium
% in Universe N/A
% in Sun N/A
% in Meteorites N/A
% in Earth's Crust N/A
% in Oceans N/A
% in Humans None

Uses of Francium
No known uses

Site Index
Element Symbol
Alkali Metal
States of Matter
List of Metals
Chemical Formulas

Privacy Statement

Cookie Policy

2017 Siteseen Ltd