Chemistry: Molecular Approach (4th Edition)

Published by Pearson
ISBN 10: 0134112830
ISBN 13: 978-0-13411-283-1

Chapter 8 - Exercises - Page 375: 3


The first attempt to organize the elements based on their similarities was made by Johann Döbereiner. He arranged the elements into triads, i.e., groups of three similar elements each. John Newlands arranged the elements in octaves, where properties of every eighth element are similar.

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