A particulate diagram shows four identical yellow spheres

CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance

Problem

A particulate diagram shows four identical yellow spheres, each surrounded by exactly four identical white spheres in a tetrahedral arrangement. No other particles are present. Which empirical formula best represents the substance depicted? (a) XY2XY_2 (b) XY3XY_3 (c) XYXY (d) XY4XY_4

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