The number of lone pairs present on the central atom of XeF2, XeF, and XeF, respectively 

Options

A. 1, 2, 3
B. 3, 2, 1
C. 2, 2, 1.
D. 1, 3, 2

Answer

To determine the number of lone pairs present on the central atom of XeF2, XeF4, and XeF6, we can follow these steps:

### Step 1: Determine the Valence Electrons of Xenon (Xe)
Xenon (Xe) is a noble gas and has 8 valence electrons.

### Step 2: Analyze XeF2
- **Bonds**: In XeF2, xenon is bonded to 2 fluorine atoms. This means there are 2 bond pairs.
- **Calculation of Lone Pairs**:
- Total valence electrons = 8
- Electrons used in bonds = 2 (1 for each bond)
- Remaining electrons = 8 - 2 = 6
- Lone pairs = Remaining electrons / 2 = 6 / 2 = 3
- **Result for XeF2**: There are 3 lone pairs on the central atom.

### Step 3: Analyze XeF4
- **Bonds**: In XeF4, xenon is bonded to 4 fluorine atoms. This means there are 4 bond pairs.
- **Calculation of Lone Pairs**:
- Total valence electrons = 8
- Electrons used in bonds = 4 (1 for each bond)
- Remaining electrons = 8 - 4 = 4
- Lone pairs = Remaining electrons / 2 = 4 / 2 = 2
- **Result for XeF4**: There are 2 lone pairs on the central atom.

### Step 4: Analyze XeF6
- **Bonds**: In XeF6, xenon is bonded to 6 fluorine atoms. This means there are 6 bond pairs.
- **Calculation of Lone Pairs**:
- Total valence electrons = 8
- Electrons used in bonds = 6 (1 for each bond)
- Remaining electrons = 8 - 6 = 2
- Lone pairs = Remaining electrons / 2 = 2 / 2 = 1
- **Result for XeF6**: There is 1 lone pair on the central atom.

### Final Summary of Lone Pairs
- **XeF2**: 3 lone pairs
- **XeF4**: 2 lone pairs
- **XeF6**: 1 lone pair

### Final Answer
The number of lone pairs present on the central atom of XeF2, XeF4, and XeF6 are 3, 2, and 1, respectively.

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