Which of the following nutrients is not cycled through the atmosphere in the context of organic chemistry?

Recognize that Carbon, Oxygen, and Nitrogen are part of cycles that involve the atmosphere. For example, Carbon is cycled through the carbon cycle, Oxygen through the oxygen cycle, and Nitrogen through the nitrogen cycle.

Note that Phosphorus is primarily cycled through the lithosphere and hydrosphere, not the atmosphere. It is part of the phosphorus cycle, which involves the movement of phosphorus through soil, water, and living organisms.