- 7.1 Development of the Periodic Table :Why classify,Genesis of Periodic Classification
- 7.2 Effective Nuclear Charge
- 7.3 Sizes of Atoms and Ions: Periodic Trends in Atomic Radii , Periodic Trends in Ionic Radii ,
- 7.4 Ionization Energy:Variations in Successive Ionization Energies , Periodic Trends in First Ionization Energies , Electron Configurations of Ions
- 7.5 Electron Affinity: Periodic Trends in Electron Affinity
- 7.6 Metals, Nonmetals, and Metalloids :Metals ,Nonmetals ,Metalloids
- 7.7 Trends for Group 1A and Group 2A Metals:Group 1A: The Alkali Metals ,Group 2A: The Alkaline Earth Metals
- 7.8 Trends for Selected Nonmetals:Hydrogen ,Group 6A: The Oxygen Group ,Group 7A: The Halogens ,Group 8A: The Noble Gases ,
- Chapter Summary and Key Terms
- Learning Outcomes
- Key Equations
- Exercises
• • 1.Air Temperature 2.Air Density 3.Air Pressure 4.UV High energy light 1.Cooler, Denser air & Hotter, less dense air. -Troposphere is less hot than stratosphere. Colder air stays below. Hotter air stays above. 2.Cooler, Denser air & Hotter, less dense air. -Cooler air is denser. Dense things are heavy. Heavy things stay below. Visa-versa. 3.Air pressure and the density of the air also decrease with altitude. -Temperature is directly proportional to pressure If air pressure increases, the temperature must increase. If air pressure decreases, the temperature decreases. Up above @stratosphere pressure is less. Less pressure; less temperature. Less temperature; colder air. Because of no air turning over, Stratosphere is still hotter than Troposphere e...
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