kate035942 kate035942

15-02-2016
Chemistry

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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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Аноним Аноним

16-02-2016

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

Answer: 1.atomic number

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