Which element primarily forms the backbone (skeleton) of most organic compounds?

• A. $Nitrogen$
• B. $Oxygen$
• C. $Sulfur$
• D. $Carbon$

Answer: (D)

Verified step by step guidance

1. Understand that the backbone or skeleton of most organic compounds is formed by a specific element that can create stable chains and rings by bonding to itself and other elements.
2. Recall that organic chemistry primarily studies compounds containing carbon, which is unique in its ability to form four covalent bonds, allowing for diverse and complex molecular structures.
3. Consider the properties of the elements listed: Nitrogen, Oxygen, Sulfur, and Carbon, and evaluate which one is most capable of forming long chains and complex frameworks.
4. Recognize that Carbon's tetravalency (four valence electrons) enables it to form strong covalent bonds with other carbon atoms and various elements, making it the fundamental element in organic molecules.
5. Conclude that Carbon is the element that primarily forms the backbone of most organic compounds due to its bonding versatility and stability.