📚 Practice Mode

Dobereiner's triads - class-XI

Learn at your own pace with hints and detailed explanations

1 / 32
Multiple Choice

According to the law of triads :

  1. the properties of the middle element were in between those of the other two members.
  2. three elements arranged according to increasing weights have similar properties.
  3. the elements can be grouped in the groups of six elements.
  4. every third element resembles the first element in periodic table.
Change Mode