What is the hybridisation of the central atom in (i) `H_(3)O^(+) (ii) XeF_(2) (iii) XeF_(4) ` ? What are their shapes ?

Explanation

To determine the hybridization of the central atom in the given compounds and their shapes, we will analyze each compound step by step.

### (i) For \( H_3O^+ \):

1. **Count the Valence Electrons**:
- Hydrogen (H) has 1 valence electron. There are 3 hydrogen atoms: \( 3 \times 1 = 3 \).
- Oxygen (O) has 6 valence electrons.
- The positive charge \( (+1) \) indicates the loss of one electron.
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