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Knowledge and Skills Statement

Science concepts. The student knows that relationships exist between the structure and properties of matter.

a characteristic of a particular substance that can be observed during or after a chemical reaction; a quality that can be established only by changing a substance's chemical identity

substance that occupies space, has mass, and is composed of microscopic particles

an organizational chart of all the known elements on Earth, organized based on the physical and chemical properties of each

observable characteristic of matter that can be used to identify particular materials

characteristic of matter that can be used to identify particular materials

something arranged in a definite pattern of organization; the arrangement of particles or parts in a substance or body; the aggregate of elements of an entity in their relationships to each other

Research

Scerri, Eric R. “The Evolution of the Periodic System.” Scientific American (2011). https://www.scientificamerican.com/article/the-evolution-of-the-periodic-system/

Summary:  The Periodic Table shows patterns in the chemical properties of elements. Elements were originally grouped into triads by similarity. Scientists then realized that elements could be a part of two different triads and be compared in two directions. Mendeleev’s system recognized a pattern in the property of elements. This article explains the history and progression of the Periodic Table and how its pattern can be used to predict the properties of elements.