Which property of $C$ makes it uniquely suited as the central atom in the chemistry of life?

• A. $C$ can only bond with $H$, limiting its chemical versatility.
• B. $C$ is the most electronegative element, enabling it to attract electrons from all other atoms.
• C. $C$ atoms are always found in ionic compounds in biological systems.
• D. $C$ can form $4$ stable covalent bonds, allowing for a wide variety of complex molecules.

Answer: (D)

Verified step by step guidance

1. Understand that the question asks about the unique property of carbon (C) that makes it central to the chemistry of life.
2. Recall that carbon has four valence electrons, which allows it to form up to four covalent bonds with other atoms.
3. Recognize that these four covalent bonds can be single, double, or triple bonds, providing versatility in molecular structures.
4. Consider that this bonding capability enables carbon to form complex and stable molecules such as chains, rings, and branches, which are essential for biological macromolecules.
5. Conclude that the ability of carbon to form four stable covalent bonds is the key property that underlies its central role in organic chemistry and life.