Atomic Theory Answers

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What is the major difference between the periodic table created by Dmitri Mendeleev and the one created by Henry Moseley?

Moseley arranged the elements in order of increasing atomic mass.

Moseley ignored variations resulting from isotopes.

Moseley arranged the elements in order of increasing atomic number.

Moseley divided the elements into four categories.

groupperiod

group

period

atomic number chemical properties number of valence electrons period number

atomic number

chemical properties

number of valence electrons

period number

decreases increases stays the same

decreases

increases

stays the same

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