Answer
b) Is the correct Lewis dot symbol for a Si atom.
Work Step by Step
1. According to the periodic table, "Si" is on the group 4A, therefore, it has 4 valence electrons. (d) and (e) are incorrect.
2. When writing the Lewis Structure, we try to avoid drawing pairs of electrons, and only do it if necessary. In this case, the most apropriate is to separate them, as in (b).
