Darw Lewis structures for `H_(2)CO_(3),SF_(6),PF_(7)and CS_(2).` Is the octet rule obeyed in these cases ?

Explanation

To draw the Lewis structures for \( H_2CO_3 \), \( SF_6 \), \( PF_7 \), and \( CS_2 \), and to determine if the octet rule is obeyed, follow these steps:

### Step 1: Draw the Lewis Structure for \( H_2CO_3 \) (Carbonic Acid)

1. **Identify the central atom**: Carbon (C) is the central atom.
2. **Count the total valence electrons**:
- Hydrogen (H) has 1 electron, and there are 2 H atoms: \( 2 \times 1 = 2 \)
- Carbon (C) has 4 electrons: \( 4 \)
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