what was johann dobereiners contribution to the development of the periodic table?\nhe arranged the elements…

what was johann dobereiners contribution to the development of the periodic table?\nhe arranged the elements according to increasing atomic mass.\nhe arranged the elements according to increasing atomic number.\nhe identified triads of elements that had similar properties.\nhe organized elements into four groups based on their properties.

what was johann dobereiners contribution to the development of the periodic table?\nhe arranged the elements according to increasing atomic mass.\nhe arranged the elements according to increasing atomic number.\nhe identified triads of elements that had similar properties.\nhe 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 done later by Moseley. Organizing into four groups is not his contribution.

Answer:

He identified triads of elements that had similar properties.