What do you understand by bond pairs and lone pairs of electrons? Illustrate by giving one example of each type.

Explanation

### Step-by-Step Solution:

1. **Definition of Bond Pairs**:
- Bond pairs of electrons are pairs of electrons that are shared between two atoms to form a chemical bond. These electrons are involved in the bonding process and help to hold the atoms together in a molecule.

2. **Example of Bond Pairs**:
- A classic example of bond pairs can be seen in the molecule Beryllium Hydride (BeH₂). In this molecule, beryllium (Be) has two electrons in its outer shell (1s² 2s²). When it bonds with two hydrogen (H) atoms, the outer electrons of beryllium are involved in hybridization and form bonds with the hydrogen atoms. The two electrons that are shared between beryllium and hydrogen atoms are considered bond pairs.

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