Who Made The Periodic Table?

Johann Doberiener

 

Quick Database:

 

Name: Johann Doberiener

DOB: December 13, 1780

DOD: March 24, 1849. Age 69

Place of Birth: Germany

 

Quick Biography

Mr Doberiener-who was known for his work on Periodic Law- was a German chemist. He was one of the first people to consider Periodic Laws starting with Doberiener's traids. Johann was born into a poor family and with his Dad as a coachman he didn't have the best education. Doberiener (at the age of 30) had the unusual skill of chemistry hypotheses which caught the attention to Duke Carl.  Duke Carl gave Johann an extraordinary position of Professor of Chemistry throughout the rest of his education.

 

 

 

Doberiener's Triads

Doberiener's Triads were made by (using John Dalton assertions) grouped elements together in threes with simular properties :

 

 Element           Lithium    Beryllium   Potassium   Arithmetic mean

 Atomic mass   7.0            9.0               11.0              9.0

 Element           Carbon    Nitrogen     Oxygen        Arithmetic mean

 Atomic mass   12.0         14.0             16.0              14.0

 

the elements the set in the order of the increasing mass and the arithmetic mean in the middle.

 

Here is a video on Johann Doberiener on youtube.