Chapter Name : Periodic Classification Of Elements |
Sub Topic Code : 102_10_05_01_01 |
Topic Name : Making In Order- Early Attempts |
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Sub Topic Name : Dobereiner's Attempts |
Dobereiner found that some elements have similar properties and can form groups of three.
Atomic mass
All triads have similar properties.
At time of Dobereiner only few elements were known. Now many more are known, so why don’t you try making more triads and become a discoverer?
Key Words | Definitions (pref. in our own words) |
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Triads | Groups of three elements each having similar properties. |
Gadgets | How it can be used |
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List of triads | Find out what properties were common in these triads. |
These triads led to development of Periodic table
Chemistry Lab
Examples | Explainations |
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Halogens | Cl, Br, I are halogens and were identified as one triad. |
System of triads
How triads were formed
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