Figure 2.2
-Refer to Figure 2.2 (first three rows of the periodic table). If life arose on a planet where carbon is absent, which element might fill the role of carbon?

Question

Quizplus · Accepted Answer

Carbon is unique in its ability to form long chains and complex molecules due to its four valence electrons. Silicon, which is one row below carbon, also has four valence electrons and could potentially form similar complex molecules. Boron, nitrogen, aluminum, and phosphorus do not have the same chemical properties as carbon and would not be able to fulfill the same role in organic chemistry.

Figure 2.2 -Refer to Figure 2.2 (First Three Rows of the Periodic