The process of formation of covalent bonds with other atoms to form long chains is called

Options

A. addition
B. coordination
C. catenation
D. polymerisation

Explanation

**Step-by-Step Solution:**

1. **Understanding Covalent Bonds**: Covalent bonds are formed when two atoms share electrons. This type of bonding is common in nonmetals, including carbon, which is known for its ability to form various structures.

2. **Identifying the Process**: The question asks for the specific process where covalent bonds are formed with other atoms to create long chains.

3. **Analyzing the Options**: The options provided are adhesion, coordination, catenation, and polymerization.
- **Adhesion** refers to the attraction between different substances.
- **Coordination** involves the interaction between a central atom and surrounding molecules or ions.
- **Polymerization** is the process of combining small molecules (monomers) into a larger structure (polymer).

4. **Defining Catenation**: Catenation is the ability of an element to form long chains or rings by bonding with itself or other atoms through covalent bonds. This is particularly prominent in carbon due to its small atomic size and the ability to form stable bonds.

5. **Conclusion**: Given the definitions and the nature of the processes, the correct answer to the question is **catenation**. This process allows atoms, particularly carbon, to form long chains through covalent bonding.

**Final Answer**: The process of formation of covalent bonds with other atoms to form long chains is called **catenation**.

---