Use a periodic table and proton number to determine simple and subshell configurations for atoms and ions, and connect valence electrons with chemical properties.
Determine the electronic configuration of elements and their ions with proton numbers. (Some examples include: a). simple configuration e.g. 2,8, b). Subshells e.g. 1s2, 2s2, 2p6, 3s1 c). Students should be able to determine both of these from the periodic table and are not required to memorize these. d) Students should understand that chemical properties of an atom are governed by valence electrons).