The weakest bond among the following is

Options

A. ionic
B. covalent
C. metallic
D. Hydrogen bondiing

Answer

To determine the weakest bond among the given options (ionic bond, covalent bond, metallic bond, and hydrogen bond), we can analyze each type of bond based on their characteristics and strengths.

### Step-by-Step Solution:

1. **Understand Ionic Bonds:**
- Ionic bonds are formed through the electrostatic attraction between positively and negatively charged ions.
- These bonds are generally very strong due to the strong electrostatic forces acting between the ions.
- **Conclusion:** Ionic bonds are strong.

2. **Understand Covalent Bonds:**
- Covalent bonds are formed when two atoms share electrons.
- The strength of a covalent bond depends on the electronegativity of the atoms involved; typically, they are strong but weaker than ionic bonds.
- **Conclusion:** Covalent bonds are strong, but weaker than ionic bonds.

3. **Understand Metallic Bonds:**
- Metallic bonds involve the attraction between positively charged metal ions and delocalized electrons.
- These bonds allow metals to conduct electricity and heat, and while they are strong, they are generally not as strong as ionic bonds.
- **Conclusion:** Metallic bonds are strong, but not as strong as ionic bonds.

4. **Understand Hydrogen Bonds:**
- Hydrogen bonds are a type of dipole-dipole interaction that occurs when hydrogen is bonded to a highly electronegative atom (like oxygen or nitrogen).
- These bonds are significantly weaker than ionic, covalent, and metallic bonds.
- **Conclusion:** Hydrogen bonds are the weakest among the types of bonds discussed.

5. **Final Comparison:**
- Comparing all the bonds:
- Ionic Bond: Strong
- Covalent Bond: Strong (but weaker than ionic)
- Metallic Bond: Strong (but weaker than ionic)
- Hydrogen Bond: Weakest
- Therefore, the weakest bond among the given options is the **hydrogen bond**.

### Answer:
The weakest bond among the following is the **hydrogen bond** (Option D).

---