Chemistry, 10.03.2021 20:20, hannahgrace325

HELP! Type the correct answer in each box. Platinum (Pt) is in the 78th position in the periodic table.
A neutral atom of the element that comes just before platinum in the periodic table has electrons and protons.

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HELP! Type the correct answer in each box. Platinum (Pt) is in the 78th position in the periodic ta...