Final answer:
The Lewis symbol of silicon has 4 valence electrons and includes 1 lone pair of electrons.
Step-by-step explanation:
The Lewis symbol of silicon has 4 valence electrons, which are represented by dots surrounding the symbol Si.
Each valence electron is represented by a dot, and the dots are shown on any of the four sides of the symbol.
Therefore, statement b, 'There is 1 lone pair of electrons,' accurately describes the Lewis symbol of silicon.