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Periodicity

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LeVanHan. Periodic Table. Digital Image. Wikipedia. Wikimedia Foundation, Inc., 2008 Web. 12 Jan. 2017.

Study the image above.

How are the elements arranged in the modern periodic table?

A

Elements are arranged by their atomic numbers.

B

Elements are arranged by their atomic mass.

C

Elements are arranged by their valence electron configurations.

D

Electrons are arranged in alphabetical order.