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How are the periods, or horizontal rows, on a periodic table ordered from left to right? (2 points) by similar state of matter. by increasing number of protons. by decreasing nu…

How are the periods, or horizontal rows, on a periodic table ordered from left to right? (2 points) by similar state of matter. by increasing number of protons. by decreasing nu…
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How are the periods, or horizontal rows, on a periodic table ordered from left to right? (2 points)

by similar state of matter.
by increasing number of protons.
by decreasing number of neutrons.
by similar number of valence electrons.

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User Ceyko
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1 Answer

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#2
They are ordered by increasing number of protons (aka atomic number)
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User Joews
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