Cpogil 2005 1 6 authored by lizabeth m tumminello edited by erin graham kelly levy ken levy and rohini quackenbush edited by linda padwa and david hanson stony brook university lewis dot structures of atoms and ions why the chemical properties of an element are based on the number of electrons in the outer shell of its atoms we use lewis dot structures to map these valence . Lewis dot structures of atoms and ions implementation plan lewis dot structures of atoms and ions written by lizabeth m tumminello this lesson is designed to be used as a part of a regular or honors chemistry class this will be done after the units on atomic structure and periodic trends are completed. Chemistry lewis dot structure worksheet answers for each molecule on the worksheet the lewis dot structure the number of valence electrons the electron arrangement e a and the molecular geometry m g are given respectively ch 2 br 2 d draw the lewis dot structures for each of the following molecules yet more lewis structures. Lewis dot structures name block 1 draw the lewis dot structures of the following atoms and their respective ions calcium sodium aluminum barium potassium magnesium cesium lithium calcium ion sodium ion aluminum ion barium ion potassium ion magnesium ion cesium ion lithium ion fluorine sulfur oxygen nitrogen chlorine selenium iodine phosphorous. Model drawing lewis dot structures for atoms and ions a lewis dot structure for an atom of chlorine is the number of valence electrons for an atom is the number of electrons in the outer energy level shell of the atom chlorines electron configuration is 2 8 7 therefore it has