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Mathematics 19 Online
OpenStudy (anonymous):

Why do elements in a group on the periodic table have similar chemical proberties

OpenStudy (anonymous):

Because of their organizations of electrons in their outer shells... this is called Valence Electrons.

OpenStudy (anonymous):

They react similarly to the World around them, yet are more or less massive depending on the number of protons and neutrons in the nucleus (atomic mass)

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