Gallium is _____ block element.

Explanation

To determine the block in which gallium (Ga) belongs, we can follow these steps:

### Step 1: Identify the Symbol and Atomic Number
Gallium is represented by the symbol **Ga** and has an atomic number of **31**.

### Step 2: Write the Electronic Configuration
To understand the block classification, we need to write the electronic configuration of gallium. The electronic configuration for gallium is:
- **1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p¹**

### Step 3: Analyze the Last Electron
In the electronic configuration, the last electron is in the **4p** subshell. This is important because the block classification of elements is determined by the subshell that receives the last electron.

### Step 4: Determine the Block
Since the last electron of gallium enters the **p orbital**, we conclude that gallium is a **p-block element**.

### Final Answer
Gallium is a **p-block element**.

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