Tuesday, September 28, 2010

Electrons and the Periodic Table

Advanced Chem

Today we discussed how light is emitted by electrons as they travel from the excited state back toward the ground state. We studied the electromagnetic spectrum and talked about the relationships between wavelength, frequency, and energy. We also looked at the concept of electron configuration. We'll get more practice with this tomorrow.

Honors Chem

Today we tried to emulate Dimitri Mendeleev by arranging elements according to increasing atomic mass and then finding patterns in chemical reactivity. We also predicted the properties for elements in our "fake periodic table" that had not been discovered yet. We'll take a closer look at two important trends tomorrow: atomic radius and ionization energy.

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