In which of the following species the bond is nondirectional ?

Options

A. `NCl_(3)`
B. `RbCl`
C. `BeCl_(2)`
D. `BCl_(3)`

Explanation

To determine which species has a nondirectional bond, we need to understand the nature of different types of bonds.

### Step-by-Step Solution:

1. **Understand Bond Types**:
- There are two main types of bonds: ionic and covalent.
- Ionic bonds are generally considered nondirectional, while covalent bonds are directional.

2. **Identify Ionic Bonds**:
- Ionic bonds form between atoms with a significant difference in electronegativity (typically greater than 1.7).
- In ionic compounds, the electrostatic attraction between oppositely charged ions leads to the formation of the bond.

3. **Evaluate Given Species**:
- We need to analyze the electronegativity differences in the given species.
- For example, if we consider RbCl (Rubidium Chloride), Rb has a low electronegativity and Cl has a high electronegativity, leading to a significant difference.

4. **Conclusion**:
- Since RbCl has a large electronegativity difference, it forms an ionic bond, which is nondirectional.
- Other species like BeCl2 and BCl3 have covalent bonds, which are directional due to the sharing of electrons between specific atoms.

5. **Final Answer**:
- Therefore, the species in which the bond is nondirectional is RbCl.