Today in class we discussed last weeks lab and the questions that went along with it. We also started working on a practice sheet to help students recognize the atomic number tells us the number of electrons and protons in an atom. The number of valence electrons is indicated by the group (sometimes called family) number by looking at the last digit of the group number (ie. group 13 has 3 valence electrons. This method only works for groups 1, 2, and 13-18!!!! These valence electrons are responsible for bonding.
Also, on the opposite side (Titled: "Reinforcement--Is It an Ion?") of the homework sheet, is an activity to help students calculate if an atom is a neutral atom or an ion. This assignment is due tomorrow, February 9.
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