Which is a stronger reducing agent , `SbH_(3)` of `BiH_(3)` , and why ?

Explanation

To determine which is a stronger reducing agent between SbH₃ (antimony hydride) and BiH₃ (bismuth hydride), we can follow these steps:

### Step 1: Identify the Group
Both antimony (Sb) and bismuth (Bi) belong to Group 15 of the periodic table, also known as the nitrogen family.

### Step 2: Analyze the Trend in the Group
As we move down the group from nitrogen to bismuth, the atomic radius increases. This is due to the addition of electron shells, which results in larger atoms.

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