Which has a larger atomic radius : Al or Ga?

Explanation

To determine which element has a larger atomic radius between aluminum (Al) and gallium (Ga), we can follow these steps:

### Step 1: Identify the Group
Both aluminum and gallium belong to Group 13 of the periodic table. The elements in this group include boron (B), aluminum (Al), gallium (Ga), indium (In), and thallium (Tl).

### Step 2: Understand the Trend in Atomic Radius
Generally, as we move down a group in the periodic table, the atomic radius increases. This is due to the addition of electron shells, which increases the distance between the nucleus and the outermost electrons.

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