According to the Dobereiner\’s triads, the average of atomic mass of first and third element is equal to the atomic mass of middle element or second element.
Dobereiner\’s triads were groups of elements with similar properties that were identified by the Wolfgang Dobereiner. He observed that groups of three elements (triads) could be formed in which all the elements shared similar physical and chemical properties
Dobereiner\’s triads were groups of elements with similar properties that were identified by the Wolfgang Dobereiner. He observed that groups of three elements (triads) could be formed in which all the elements shared similar physical and chemical properties.N OF Na MgGerman chemist Johann