Answer:
The correct answer is
18
Groups of the periodic table: The s-, p-, and d-block elements of the periodic table are arranged into 18 numbered columns, or groups.
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B. Sedimentary because igneous and metamorphic have nothing to do with the question asked
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2 the YY is yellow.
the Yy is yellow
yy is blue
SS is square
Ss is square
ss is round
