What is the basicity of `H_(3)PO_(3)` ?

Explanation

To determine the basicity of \( H_3PO_3 \) (phosphonic acid), we will follow these steps:

### Step 1: Identify the Structure of \( H_3PO_3 \)
The first step is to understand the structure of phosphonic acid. The formula \( H_3PO_3 \) indicates that there are three hydrogen atoms, one phosphorus atom, and three oxygen atoms.

### Step 2: Draw the Structural Formula
The structural formula of \( H_3PO_3 \) can be represented as follows:
- Phosphorus (P) is the central atom.
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