Maximum covalency of nitrogen is four. Explain. 

Explanation

To explain why the maximum covalency of nitrogen is four, we can break it down into several steps:

### Step 1: Understanding Nitrogen's Electron Configuration
Nitrogen has an atomic number of 7, which means it has 7 electrons. The electron configuration of nitrogen is:
- 1s² 2s² 2p³
This indicates that nitrogen has:
- 2 electrons in the 1s orbital
- 2 electrons in the 2s orbital
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