The number and type of bonds between two carbon atoms in `CaC_(2)` are:

Options

A. one sigma and one pi bonds
B. one sigma and two pi bonds
C. one sigma and half pi bond
D. one sigma bond

Answer

To determine the number and type of bonds between two carbon atoms in the compound calcium carbide (CaC₂), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Formula and Structure**:
- The chemical formula for calcium carbide is CaC₂. In this compound, there are two carbon atoms bonded together.

2. **Dissociation of CaC₂**:
- When calcium carbide dissociates, it forms calcium ions (Ca²⁺) and carbide ions (C₂²⁻). The carbide ion (C₂²⁻) is crucial for understanding the bonding between the carbon atoms.

3. **Determine the Structure of the Carbide Ion (C₂²⁻)**:
- The C₂²⁻ ion has a linear structure and can be represented as C≡C, indicating that there is a triple bond between the two carbon atoms.

4. **Identify the Types of Bonds**:
- A triple bond consists of one sigma (σ) bond and two pi (π) bonds. Therefore, between the two carbon atoms in the C₂²⁻ ion, there is:
- 1 sigma bond
- 2 pi bonds

5. **Conclusion**:
- In summary, the number and type of bonds between the two carbon atoms in CaC₂ is:
- 1 sigma bond and 2 pi bonds.

### Final Answer:
The number and type of bonds between two carbon atoms in CaC₂ are: **1 sigma bond and 2 pi bonds**.

---