Final answer:
The electron configuration for silicon (Si) is 1s2 2s2 2p6 3s2 3p2.
Step-by-step explanation:
The electron configuration for silicon (Si) can be written as 1s2 2s2 2p6 3s2 3p2. This means that the first energy level (n=1) has 2 electrons, the second energy level (n=2) has 8 electrons, and the third energy level (n=3) has 4 electrons. The valence shell, which is the outermost occupied energy level, is the third energy level with 4 electrons in the 3s and 3p orbitals.