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Atomic Coatings—The Size of an Atom—Student Laboratory Kit

By: The Flinn Staff

Item #: AP6628

Price: $29.25

The Atomic Coatings and the Size of an Atom Chemistry Laboratory Kit allows students to “see” the minute size of an atom by measuring the mass of zinc coating on a piece of galvanized iron. This experiment is quick, simple and accurate.

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This item can only be shipped to schools, museums and science centers

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How can we get students to “see” the extremely small size of an atom? In this experiment, students measure the mass of the zinc coating on a piece of galvanized iron by reacting the metal with hydrochloric acid. Only the zinc, not the underlying iron, reacts with the acid under these conditions. The volume and thickness of the zinc coating are also determined. Given the diameter of a zinc atom, students can then “count” the number of layers of atoms in the invisible coating. It’s a quick and simple experiment, but one that will really help your students build an accurate model of atomic structure. Includes reproducible student handouts, detailed background information, Teacher Notes with sample data and answers to questions and all necessary chemicals and supplies.

Complete for 30 students working in pairs.