The Compound M-O-H can act both as an acid or base depending upon the ionization enthalpy of the element M. Justify by taking elements (M) of the third period of the periodic table .

Explanation

To justify how the compound M-O-H can act as both an acid and a base depending on the ionization enthalpy of the element M, we will analyze the elements in the third period of the periodic table: sodium (Na), magnesium (Mg), aluminum (Al), silicon (Si), phosphorus (P), sulfur (S), and chlorine (Cl).

### Step-by-Step Solution:

1. **Understanding the Compound M-O-H**:
- The compound M-O-H can be viewed as a metal hydroxide, where M represents a metal from the third period, and O-H represents the hydroxide ion (OH⁻).
- Depending on the nature of the metal M, the compound can exhibit acidic or basic properties.

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