Chemistry
Chemistry, 05.06.2020 16:01, nay191

Why are elements in the tall columns of the periodic table called "representative elements"?
A. They all have the same number of isotopes.
B. They represent the elements on Mendeleev's table.
C. They follow a pattern for valence electrons.
D. They all share the same chemical properties.

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Why are elements in the tall columns of the periodic table called "representative elements"?
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