Biology, 29.09.2021 01:00, triddi666

The modern periodic table is different from Mendeleev's in several ways. Which of these is described in the reading passage?
A. The inert gases occupy one column of the table.
B. Elements are arranged by increasing atomic number, not atomic mass.
C. There are blank spots in the middle for undiscovered elements.
D. Elements are put into columns based on similar chemical properties

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