Question

select the correct answer.

which of these elements is rarely found in organic molecules?

hydrogen
oxygen
barium
carbon

Explanation:

Identify organic elements

Organic molecules are primarily composed of carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur.

Evaluate the options

Carbon, hydrogen, and oxygen are the main building blocks of life. Barium is a heavy alkaline earth metal.

Determine the rare element

Barium is not a standard component of biological macromolecules and is rarely found in organic molecules.

Answer:

• hydrogen
• oxygen
• barium (Correct answer)
• carbon