Intro to Chem and Physics: Quiz Objectives (11/01/10)
Describe the Valence Shell Model
shows how many electrons are in the outer most shell.
Describe how the valence shell model is represented by the periods in the periodic table.
you count over from left to right (including the element, excluding transitional metals), and the period number is which shell it is, and the number of elements to your element is how many electrons it has in it's outermost shell. EX: Mg is in the 3rd period, and is the 2nd element...therefore it has 2 full shells, and it's outer shell will have 2 electrons in it.
Draw and explain the Lewis Dot Structure and draw it for Pb and Ca.
Valence electrons are drawn as dots around the symbol of an element....