what was johann dobereiners contribution to the development of the periodic table?\no he arranged the…

what was johann dobereiners contribution to the development of the periodic table?\no he arranged the elements according to increasing atomic mass.\no he arranged the elements according to increasing atomic number.\no he identified triads of elements that had similar properties.\no he organized elements into four groups based on their properties.

what was johann dobereiners contribution to the development of the periodic table?\no he arranged the elements according to increasing atomic mass.\no he arranged the elements according to increasing atomic number.\no he identified triads of elements that had similar properties.\no he organized elements into four groups based on their properties.

Answer

Brief Explanations:

Johann Dobereiner identified triads of elements with similar properties. For example, the lithium - sodium - potassium triad. Arranging by atomic mass was done by others like Newlands and Mendeleev, and arranging by atomic number was by Moseley. Organizing into four groups is not his contribution.

Answer:

He identified triads of elements that had similar properties.