Dmitri Mendeleev's Periodic Law states that chemical and physical properties repeat themselves in groups of _____. A. 4 B. 8 C. 12 D. 16

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Dmitri Mendeleev's Periodic Law states that chemical and physical properties repeat themselves in groups of 8.
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Dmitri Mendeleev's Periodic Law states that chemical and physical properties repeat themselves in groups of _____.

Answer: 8

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