Mendeleev ordered the elements in his version of the periodic table on the basis of atomic masses instead of their atomic numbers. why?

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Jean KeelingLv2

28 Sep 2019

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Which of the following statements concerning the periodic table isincorrect?
A. Mendeleev received most of the credit for the early developmentof the periodic table.
B. The elements in a given group or family have similar chemicalproperties.
C. Mendeleev left spaces in his periodic table for undiscoveredelements.
D. All the elements are arranged in order of increasing atomicweight.
E. The chemical characteristics of the elements are periodicfunctions of their atomic numbers.

Indium oxide contains 4.784 g of indium for every 1.000 grams of oxygen. In 1869, when Mendeleev presented his version of the periodic table, he proposed the formula in for indium oxide. Before that time it was thought that the formula was . What values for the atomic mass of indium are obtained using these two formulas? Assume that the oxygen has an atomic mass of 16.00.