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General chemistry: Electrons

(1) Learn the Bohr Model, the Aufbau Principle, and Hund's Rule.

(2) Practice using the periodic table, the Aufbau Principle, and Hund's Rule to create atomic orbital energy diagrams and electronic configurations.

(3) An easy and fast way to find out how many valence electrons an atom has is to count 1, 2, 3 and so on starting at the left most element, skipping the transition metals, and ending at the right most element in the same row of the periodic table.