What is the difference between electrovalency and covalency?

Explanation

### Step-by-Step Text Solution

1. **Definition of Electrovalency**:
- Electrovalency refers to the number of electrons that an atom gains or loses to achieve a stable electronic configuration, typically an octet. It is primarily associated with the formation of ionic compounds.
- Example: In sodium chloride (NaCl), sodium (Na) loses one electron to form Na⁺, and chlorine (Cl) gains one electron to form Cl⁻. Here, the electrovalency of both Na and Cl is 1.

2. **Definition of Covalency**:
- Covalency is the number of electrons that an atom shares with another atom to form a covalent bond. This concept is associated with covalent compounds.
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