What is the ground-state electron configuration for silicon (Si)?

• A. $1^{s}22^{s}22^{p}63^{s}13^{p}3$
• B. $1^{s}22^{s}22^{p}63^{s}23^{p}6$
• C. $1^{s}22^{s}22^{p}63^{s}23^{p}2$
• D. $1^{s}22^{s}22^{p}63^{s}23^{p}4$

Answer: (C)