The most metallic element in group `15` is _____ .

Answer

To determine the most metallic element in Group 15, we can follow these steps:

### Step 1: Understand the Group 15 Elements
Group 15 of the periodic table consists of the following elements: Nitrogen (N), Phosphorus (P), Arsenic (As), Antimony (Sb), and Bismuth (Bi).

### Step 2: Define Metallic Character
Metallic character refers to the tendency of an element to lose electrons and form positive ions (cations). Metals typically exhibit higher metallic character compared to non-metals.

### Step 3: Analyze the Trend in Metallic Character
In general, metallic character increases as you move down a group in the periodic table. This is due to the following reasons:
- **Atomic Size**: As we move down the group, the atomic size increases. Larger atoms have their outer electrons further from the nucleus, making them easier to lose.
- **Nuclear Charge**: Although the nuclear charge increases down the group, the effect of increased shielding (due to additional inner electron shells) outweighs this, making it easier for the outer electrons to be lost.

### Step 4: List the Elements in Order of Metallic Character
Based on the trend of increasing metallic character from top to bottom in Group 15, we can arrange the elements as follows:
1. Nitrogen (least metallic)
2. Phosphorus
3. Arsenic
4. Antimony
5. Bismuth (most metallic)

### Step 5: Conclusion
From the analysis, we conclude that the most metallic element in Group 15 is **Bismuth (Bi)**.

### Final Answer
The most metallic element in Group 15 is **Bismuth (Bi)**.

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