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What determines the order of placement of the elements on the modern Periodic Table? 1.atomic number 2.atomic mass 3.the number of neutrons, only 4.the number of neutrons and protons
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What determines the order of placement of the elements on the modern Periodic Table?

1.atomic number
2.atomic mass
3.the number of neutrons, only
4.the number of neutrons and protons

User Timothyqiu
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1 Answer

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The periodic table was and still is arranged in increasing atomic number, aka number of protons.

Answer: 1.atomic number
User Carsten Zeitz
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