George Karl von Hevesy (1885 - 1966)

Name: George Karl von Hevesy
DOB: 1885

Died: 1966.
Discoveries: Hafnium in 1922.

Hevesy was born in Budapest,Hungary and naturalized himself to become a Swedish. He died in Friburgh in 1966.
He was privileged to study in Budapest,Berlin and Friburgh and was teacher in Budapest,Copenhangen,Friburgh and Stockholm. With Dutch D. Coster, he began the research work that lead him to the discovery of Hafnium in 1922.

He also studied its compounds as well as the elements usually called rare-earths. He also devoted some time to biochemistry and above all, to radioactivity.

Hevesy was granted the Nobel Prize of Chemistry in 1943 for his work on Isotopes and the chemical properties of substances.

Friedrich Wohler (1800 - 1882)

Friedrich Wohler Preview:

Name: Friedrich Wohler
DOB: 1800

Died: 1882.
Discoveries: Isolated Aluminium,Beryllium and obtained Urea.

Wohler, the German Chemist was birthed in Eschersheim in the year 1800 and died after 82 years in Goettingen in the year 1882.

He was once a professor at the University of Goettinghen.
He obtained Urea for the very first time in the history of man in 1828 through the synthesis of ammonia compounds. This idea however,was contradictory to what was been used at that time for the synthesis of Organic compounds.

 However,he did it again in 1827 and 1828 when he Isolated aluminium and beryllium respectively for the first time in the history of man.

Carl william Scheele (1742 - 1786)

Carl Wilhelm Scheele (1742 - 1786)

Lets take a quick look at who we've got on our list of great scientists today:

Name: Carl Wilhelm Scheele
DOB: 9th/Dec/1742
Died: 21st/May/1786
Discovery: Manganese dioxide Analysis (let to Chlorine and Barite discoveries.)

 Carl Wilhelm Scheele to history was a Sweedish Chemist who was born in Stralsund in the year 1742 and died in Koping on the 21st day of May in the year 1786.
Carl was basically interested in the various themes of pure chemistry, especially because of his 28 years of close friendship with Bergman.

Carl Wilhelm Scheele was called in 1775 as a member of the Science Academy of Stockholm (oh! that's a big Academy. I am also dreaming of one as a scientist too). In the same year, Frederic the great tried to pull him to continue his studies at any University in London or better still,close up at Berlin but refused and decided to settle down with his own pharmacy at Koping, where most of his original works was accomplished.
In 1774, Carl analyzed the Manganese oxide which lead the way through to the discovery of Chlorine and Barite and some other descriptions of Manganese compounds.

Chlorine.

A common sense will flash us back to NaCl when we talk about Chlorine. But we did rather say Chlorine ia a heavy yellow irritating toxic gas  belonging to the Halogen family. It is used to purify water and also serve as a bleaching agent and a disinfectant.
It is the chemical element with atomic number 17 and Cl as symbol.

Barite.

Barite isn't a common element to common science students in this part of the world but we all learnt that barite is an heavy spar,white,colourless,light blue,light yellow or light red in colour. It can be used in the medical arena as an inicator or as a paint pigment or lubricant when added to other compounds in the chemical industries.