Identify the following on the basis of given atomic numbers:
19,15,14,8,4
Non-metal (solid) with valency of 3

Explanation

To identify the non-metal solid with a valency of 3 based on the given atomic numbers (19, 15, 14, 8, 4), we can follow these steps:

### Step-by-Step Solution:

1. **List the Elements Corresponding to the Atomic Numbers**:
- Atomic number 19: Potassium (K)
- Atomic number 15: Phosphorus (P)
- Atomic number 14: Silicon (Si)
...