When was the discovery of Francium?

Answer 1

Francium was discovered in 1939 by French chemist Marguerite Perey. Francium is one of the rarest elements found on the earths surface and there is less than an ounce of it in the earths crust, therefore, this made it hard for Francium to be discovered, and was finally discovered 80 years after all of the others.

Answer 2

Francium is a natural chemical element but the total quantity of francium in the earth crust is only approx. 30 g. Francium has ca. 40 isotopes and isomers but only two are natural: 221Fr (in the neptunium decay chain series) and 223Fr (in the actinium decay chain series). Artificially preparation of francium isotopes is also extremely difficult and expensive; and the chemistry and physics of isotopes was developed essentially after 1940. Supplementary, the most stable isotope of francium has a half life of only 21,8 minutes and is strongly radioactive; the half lives of the artificially prepared isotopes are more smaller.

This is sufficient reason to explain why francium was later discovered and why even today is only slightly studied.

Answer 3

Francium was discovered by Marguerite Perey in 1939 during a study on actinium-227: she observed an energy level possibly attributable to a new element. After some chemical experiments she was sure that the radiation is from a new chemical element, after this called francium.

Answer 4

Marguerite Perey discovered francium in 1939. It is named after the country it was discovered in which is France. Marguerite was researching radioactive decay of actinium-227 and discovered that francium is naturally made when actinium-227 emits an alpha-particle.

Answer 5

Francium was discovered by Marguerite Perey in 1939 during a study on actinium-227: she observed an energy level possibly attributable to a new element. After some chemical experiments she was sure that the radiation is from a new chemical element, after this called francium.

Answer 6

The element was identified by French scientist Marguerite Perey in 1939 (hence the name). There were earlier incomplete or erroneous discoveries.

Soviet scientist D. K. Dobroserdov was the first to announce indications of the element (aka eka-caesium) in 1925 and named it russium. But he made no further work on isolating it.

Answer 7

Francium was discovered in 1939 by Marguerite Perey of the Curie Institute in Paris, France but its existence was predicted by Mendeleev during the 1870's.

Answer 8

Francium was discovered in 1939 by Marguerite Perey in France. It is a highly reactive and unstable alkali metal with atomic number 87.

Answer 9

In 1886