Question 4.10: Draw the Lewis symbol for each of the following: a. bromine ......

a.  The Lewis symbol for bromine, which is in Group 7A (17), has seven valence electrons. Thus, three pairs of dots and one single dot are drawn on the sides of the Br symbol.

\cdot \ddot{\underset{\cdot \cdot}{Br} } \dot{\cdot}
b.  The Lewis symbol for aluminum, which is in Group 3A (13), has three valence electrons drawn as single dots on the sides of the Al symbol.