Why two hydrogen atoms combine to form ` H_(2)` but two helium atoms do not combine to form ` He_(2)` ?

Explanation

To understand why two hydrogen atoms combine to form H₂ while two helium atoms do not combine to form He₂, we need to analyze the electronic configurations and stability of these atoms.

### Step-by-Step Solution:

1. **Understanding Electronic Configuration**:
- Hydrogen (H) has an atomic number of 1, which means it has 1 electron. Its electronic configuration is 1s¹.
- Helium (He) has an atomic number of 2, which means it has 2 electrons. Its electronic configuration is 1s².

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