Name one function and one deficiency symptom of the following elements :
nitrogen

Explanation

### Step-by-Step Solution:

1. **Function of Nitrogen:**
- Nitrogen is an essential nutrient for plants. It plays a crucial role in various physiological processes.
- One of the primary functions of nitrogen is that it is a key component of chlorophyll, the pigment responsible for the green color in plants.
- Additionally, nitrogen is vital for the synthesis of amino acids, which are the building blocks of proteins. Proteins are essential for plant growth and development.
- Nitrogen is also involved in the process of photosynthesis, which is how plants convert light energy into chemical energy.

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