Which of the following statements is true regarding the structure of organic molecules?

• A. Organic molecules are always ionic compounds.
• B. Organic molecules primarily consist of $C$ and $H$ atoms.
• C. Organic molecules are typically composed of metals and nonmetals.
• D. Organic molecules cannot contain $O$ atoms.

Answer: (B)

Verified step by step guidance

1. Identify the key elements that are typically found in organic molecules. Organic chemistry primarily deals with compounds containing carbon atoms.
2. Recognize that hydrogen is another common element in organic molecules, often forming hydrocarbons with carbon.
3. Understand that organic molecules can also contain other elements such as oxygen, nitrogen, sulfur, and halogens, but they are primarily composed of carbon and hydrogen.
4. Evaluate the statement that organic molecules are always ionic compounds. Organic molecules are usually covalent, not ionic.
5. Consider the statement that organic molecules are typically composed of metals and nonmetals. Organic molecules are generally composed of nonmetals, particularly carbon and hydrogen.