Answer the following questions about the macronutrients phosphorus, chlorine, and sodium. Classify each element as a metal, nonmetal, or metalloid.

Phosphorus:

- Phosphorus is classified as a nonmetal.
- It is an essential macronutrient that plays a vital role in various biological processes, such as energy production, DNA and RNA synthesis, and bone formation.

Chlorine:
- Chlorine is classified as a nonmetal.
- It is an essential macronutrient and a key component of chloride ions in the body.
- Chloride ions are involved in maintaining fluid balance, regulating pH levels, and assisting in nerve impulse transmission.

Sodium:
- Sodium is classified as a metal.
- It is an essential macronutrient and a major component of extracellular fluid in the body.
- Sodium plays a critical role in maintaining fluid balance, nerve impulse transmission, muscle contraction, and regulating blood pressure.