Segments in this Video

Classification Schemes (03:58)

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Learn about the history of the periodic table and various ways elements have been organized.

Atomic Number (02:04)

Moseley found that the number of protons in the nucleus corresponded exactly with an element's spot on the periodic table. Radhakrishnan explains element reactivity.

Reactions of Alkali Metals (02:59)

Watch as Rosenberg experiments with the reactivity of alkali metals. A 1947 experiment drops 20,000 pounds of metallic sodium into a frozen lake.

Electron Configuration (03:16)

Radhakrishnan explains the electron configuration of elements on the table. Learn an important observed principle of electron transactions between atoms.

Alkaline Earth Metals (02:26)

Alkaline earth metals are compared to alkali metals. Rosenberg experiments with magnesium and calcium. All chemical reactions are sped up by using heat.

Orbital Blocks (03:48)

Radhakrishnan explains how the periodic table organizes elements into blocks. Learn about the history of Seaborg's actinide series.

Synthesizing New Elements (07:20)

Nuclear chemists have synthesized nearly two dozen additional elements. Learn the scientific steps involved in this process.

Credits: Organizing Atoms and Electrons: Chemistry: Challenges and Solutions (00:24)

Credits: Organizing Atoms and Electrons: Chemistry: Challenges and Solutions

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Organizing Atoms and Electrons: Chemistry: Challenges and Solutions

Part of the Series : Chemistry: Challenges and Solutions
3-Year Streaming Price: $149.95

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Description

For centuries, chemists tried to organize elements around patterns of chemical and physical trends. Physical characteristics, including atomic radius and reactivity, depend on electron configuration and can be teased from a careful understanding of the periodic table. Today the periodic table is continually updated as new heavy elements are synthesized in research laboratories.

Length: 28 minutes

Item#: BVL110251

Copyright date: ©2014

Closed Captioned

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