Three elements of `3^(rd)` period x,y,z such that the oxide of X is acidic, y is amphoteric and z id basic, the order of atomic no of three elements isL

Options

A. `xgtygtz`
B. `ygtxgtz`
C. `zgtxgty`
D. `xgtzgty`

Answer

To solve the question, we need to identify three elements from the third period of the periodic table (sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chlorine, and argon) based on the properties of their oxides.

### Step-by-Step Solution:

1. **Identify the Oxide Properties**:
- We need to find three elements (X, Y, Z) such that:
- The oxide of X is acidic.
- The oxide of Y is amphoteric.
- The oxide of Z is basic.

2. **Determine the Elements**:
- **Acidic Oxide (X)**: In the third period, the element that forms an acidic oxide is **Sulfur (S)**. Sulfur dioxide (SO₂) is acidic.
- **Amphoteric Oxide (Y)**: The element that forms an amphoteric oxide is **Aluminum (Al)**. Aluminum oxide (Al₂O₃) is amphoteric.
- **Basic Oxide (Z)**: The element that forms a basic oxide is **Sodium (Na)**. Sodium oxide (Na₂O) is basic.

3. **List the Elements with Atomic Numbers**:
- Sodium (Na) has an atomic number of 11.
- Aluminum (Al) has an atomic number of 13.
- Sulfur (S) has an atomic number of 16.

4. **Order the Elements by Atomic Number**:
- Based on the atomic numbers:
- Z (Na) = 11 (Basic)
- Y (Al) = 13 (Amphoteric)
- X (S) = 16 (Acidic)
- Therefore, the order of atomic numbers is:
- X > Y > Z (16 > 13 > 11).

5. **Final Answer**:
- The order of atomic numbers of the three elements is: **X > Y > Z**.