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Name: Kate
Status: student
Age: 14
Location: N/A
Country: N/A
Date: 1999-2001

Dear scientist,

Please help. My chemistry teacher Mrs Clarke has told me and my friend to research and do a poster on the scientist Dobereiner.

We have searched everywhere and don't have much time left. It would be wonderful if you could send me some info or tell me where i could find out more.

There are a number of places on the internet who have some information on him. As always with the 'net, check their sources before believing them.

Here is a brief description from one sight that can get you started:

Dbereiner, Johann (1780-1849)

German chemist who developed the Law of Triads in 1829 in an early attempt to classify the chemical elements. This law organized elements in groups of of three having similar properties (such as chlorine, bromine, and iodine) and stated that the average mass of the first and third equaled the mass of the second. This law is approximately true for several groups of elements. Dbereiner's classification scheme was improved and perfected by Mendelev.

Look up anything on the history of the periodic table and you should find out a little more.

Also, check out the encyclopedias in your library, you should find out a little there.

Also, if you have access to the internet, go to and try a search, with Dobereiner Johann, and you should pull up a number of sights, some of which are quite good, one is:

Eric Tolman
Computer Scientist


We do not want to see you overstressed, do we?

Anyway, here is a start.

Johann Dbereiner (Doebereiner), German chemist (I think he was born in what is Poland now) is known for his contribution to the development of the periodic table of chemical elements. In about 1829 he reported his law of Triads. This law essentially says that chemical elements can be grouped in sets of three where the properties of the middle element could be inferred from the lighter and heavier one. This tabular system was later improved to it present form by the Russian scientist Mendelev. Dbereiner is also known for a developing a table lighter that used hydrogen gas to produce a flame. Hydrogen, as you know, is explosive and his lighters were not safe!!

If you need his list of his tirads, look at the following web site.'s_Triads.html

For more information, please go to a good library and look for an encyclopedia of chemistry, or books of history of chemistry or books on the development of the periodic table.

Best of luck

Dr. Ali Khounsary
Advanced Photon Source


These are a bit sketchy but hope they are a little help.

Carole Farber

I found these two sites on the web using webcrawler search engine. I recommend looking at them to give you an idea on where to investigate further. After you get a better idea, go to your local public library and look more into encyclopedias and chemistry reference books.

good luck on that report.

C. Murphy

A quick web search turned up three scientists named "Dobereiner," and two of themn actually had some information about them. The third was just mentioned as one author of a research paper in astronomy. The other two are a scientist in Brazil who works at developing environmentally friendly fertilizers,

and the other was a pioneer in the development of the periodic law of the elements.

Richard Barrans Jr., Ph.D.

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