Francium (Franci-none): The Unstable Metal Madhav muralidharan menon - Bryan f

Francium (Fr) was discovered in 1939 by a French scientist named Marguerite Perey. She discovered the element while working at the Curie Institute in Paris. While she did discover Francium it was not until the years following World War II that she got the rightful credit for her discoveries. The name Francium originates from the word France because the element was discovered by Marguerite Perey who was a French scientist and from France. (

France, where Marguerite Perey discovered Francium, also the place that it is named after. (
  • The atomic number of Francium is 87
  • The atomic mass of Francium is 233.0
  • Francium has 87 protons, 136 neutrons and 87 electrons
  • Francium has four stable isotopes: Fr-212, Fr-221, Fr-222, Fr-223

Unlike some elements there is a very small amount of Francium naturally found in the earth's crust. In the earth's crust there is less than 30 grams of present at any moment making Francium the second least, naturally abundant element. To compare, two CD's are a little more then 30 grams. (


When Marguerite Perey first discovered Francium she found it by researching the radioactive decay of actinium. She saw that Francium occurs naturally from alpha radioactive decay of actinium. This shows that the heaviest elements normally have more alpha decay then beta decay. ( Caption) for Image: (

As we know Francium has 4 stable isotopes. All four of these isotopes have a extremely short half life. Francium’s isotope with the longest half life, has a half life of 22 minutes. The other isolates have half lives of 5 minutes, 19 minutes and 0.7 micro seconds. This results in there not being many major uses for Francium because there is not enough time to use Francium. Though some scientists use Francium for basic chemical and biological research. (


When Francium was discovered it marked the end of humankind's discovery of natural elements. This means that all elements found after Francium were made in a lab. (

This picture does not depict Francium reacting with water because it is likely that Francium has never repeated with water. Instead this picture shows another alkali metal reacting with water. (

Francium is an alkali metal and it reacts with water just like the other alkali metals. Going down group 1 (where Francium is located) we can see that there are energetic reactions because the Hydrogen can ignite and explode. Though Francium is highly expensive and rare so I doubt that anyone would have tried to make Francium react with water. 1st source ( 2nd source (htm

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