Which of the group `15` elelments are non-metallic ?

Options

A. N
B. P
C. As
D. Sb

Explanation

To determine which of the Group 15 elements are non-metallic, we can follow these steps:

### Step 1: Identify the Group 15 Elements
Group 15 of the periodic table includes the following elements:
- Nitrogen (N)
- Phosphorus (P)
- Arsenic (As)
- Antimony (Sb)
- Bismuth (Bi)

### Step 2: Understand the Metallic Character Trend
As we move down the group from nitrogen to bismuth, the metallic character of the elements increases. This means that:
- Nitrogen and phosphorus are non-metals.
- Arsenic is a metalloid (exhibiting properties of both metals and non-metals).
- Antimony and bismuth are considered metals.

### Step 3: Classify Each Element
Based on the trend:
- **Nitrogen (N)**: Non-metal
- **Phosphorus (P)**: Non-metal
- **Arsenic (As)**: Metalloid
- **Antimony (Sb)**: Metal
- **Bismuth (Bi)**: Metal

### Step 4: Conclusion
The non-metallic elements in Group 15 are:
- **Nitrogen (N)**
- **Phosphorus (P)**

Thus, the answer to the question is that nitrogen and phosphorus are the non-metallic elements in Group 15.

### Final Answer
The non-metallic elements in Group 15 are Nitrogen (N) and Phosphorus (P).

---