Out of `sigma` and `pi-` bonds, which one is stronger and why?

Explanation

To determine which bond is stronger between sigma (σ) and pi (π) bonds, we can analyze their formation and characteristics step by step.

### Step-by-Step Solution:

1. **Definition of Sigma and Pi Bonds**:
- A sigma bond (σ) is formed by the head-on (end-to-end) overlapping of atomic orbitals. This type of overlap occurs along the axis connecting the two bonding nuclei.
- A pi bond (π) is formed by the sidewise (lateral) overlapping of atomic orbitals. This overlap occurs above and below the axis connecting the two bonding nuclei.

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