7.5 Periodic Trends | High School Chemistry

Описание: Chad provides a summary of three period trends: atomic radius, ionization energy, and electron affinity. He explains the trend for atomic radius in terms of the number of shells of electrons and the effective nuclear charge. He then shows how the trend for atomic radius is related to bond length how ionic radius compares to atomic radius, and the relative radii in an isoelectronic series. Chad then presents the general trend for first ionization energy and how to identify the numerous exceptions and shows the relationship between the successive ionization energies and an element's number of valence electrons. Finally Chad covers the general trend for electron affinity as well as the numerous exceptions to the trend.

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00:00 Lesson Introduction
01:17 Atomic Radius Trend
02:03 Effective Nuclear Charge
09:18 Bond Length and Atomic Radius
11:28 Ionic Radius
16:12 Isoelectronic Series
17:58 Ionization Energy and Electron Affinity
21:09 Exceptions in the Ionization Energy Trend
25:32 Exceptions in the Electron Affinity Trend
28:15 Successive Electron Affinities (2nd, 3rd, etc.)
31:51 Successive Electron Affinities

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