Two hundred years before Mendeleev created the periodic table, scientists observed patterns in the elements and tried to sort them. The brief first video in a 15-part series explains the development of the periodic table and the many changes it went through before others accepted it.

Concepts

the periodic table, elements, atomic mass, famous scientists, periodic trends

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Additional Tags

science

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Instructional Ideas

• Display some of the earlier periodic tables that are no longer in use
• Discuss the most recent additions to the periodic table

Classroom Considerations

• Relies on some basic knowledge of elements and their properties

Pros

• Connects to classification systems and the scientific method
• Links the past to the future through math and science

Cons

• None

Common Core

RST.9-10.4 RST.11-12.4