English Language · English

Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph. A. By arraying elements in rows and columns, placing like substances in vertical groups, Mendeleyev accurately predicted that other elements would eventually be discovered. B. That insight led him to outline the periodic table still in use today. C. Charting the elements for a textbook in the late 1860s, Russian chemist Dmitry Mendeleyev noticed similarities in groups of elements based on their atomic weight: Each element resembled the eighth to follow it. D. Later, the chart was recognised to reflect the proton count in an atom's nucleus - an element's atomic number. E. It contains 118 elements, as many as 90 of which occur naturally.