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First year undergraduate chemistry education study program students come from high schools in various regions in East Java. In this study, students conceptions of the concept of atomic and periodic system elements were obtained with a three-tier test instrument. Students choose one of the 5 answer choices, choose one of the 5 reasons provided, and determine the level of confidence in answering the question. As many as 31 Chemistry education students filled 3 questions related to the concept of atomic concepts and the periodic system of elements. The data obtained shows that there are still students who experience misconceptions and ignorance of the concept of the atomic concept and the periodic system of elements.