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

Options

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

Explanation

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

### Step 1: Identify the bonding in CaC₂
Calcium carbide consists of calcium ions (Ca²⁺) and carbide ions (C₂²⁻). The carbide ion contains two carbon atoms that are bonded together.

### Step 2: Determine the type of bond between the carbon atoms
In the carbide ion (C₂²⁻), the two carbon atoms are connected by a triple bond. A triple bond consists of one sigma bond and two pi bonds.

### Step 3: Count the number of sigma and pi bonds
- **Sigma Bonds**: There is 1 sigma bond in a triple bond.
- **Pi Bonds**: There are 2 pi bonds in a triple bond.

### Final Answer
The number and type of bonds between the two carbon atoms in CaC₂ are:
- **1 Sigma bond**
- **2 Pi bonds**