Define electropositivity.

Explanation

### Step-by-Step Text Solution for the Definition of Electropositivity

1. **Understanding Electropositivity**: Electropositivity refers to the ability of an element to lose electrons and form positive ions (cations).

2. **Definition**: Electropositivity is defined as the tendency of an element to donate an electron and form a positive ion.

3. **Example of Electropositivity**:
- Take sodium (Na) as an example. Sodium has 11 electrons, with one electron in its outermost shell.
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