Organic compounds contain carbon and at least one of which elements?

• A. Hydrogen
• B. Oxygen
• C. Nitrogen
• D. Hydrogen, Oxygen, and/or Nitrogen

Answer: (D)

Organic compounds are built around carbon, and in most of these molecules that carbon backbone is bonded to hydrogen and often also to other elements such as oxygen or nitrogen. That means you’ll typically see carbon plus at least one of hydrogen, oxygen, or nitrogen in organic substances. For example, methane is carbon with hydrogen; ethanol has carbon, hydrogen, and oxygen; and methylamine contains carbon, hydrogen, and nitrogen. If you restrict the description to only hydrogen, you’d miss many common organics that include oxygen or nitrogen but not hydrogen, and if you restricted it to only one other element you’d miss the wide variety of organic structures that mix different elements. So the broad statement—carbon plus at least one of hydrogen, oxygen, or nitrogen—best captures the usual composition of organic compounds.