Draw the Lewis structures for the following molecules and ions :
`H_2 S ,SiCl_4 ,BeF_2 ,CO_(3)^(2-) ,HCOOH`

Explanation

To draw the Lewis structures for the given molecules and ions, we will follow these steps for each compound:

### 1. H₂S (Hydrogen Sulfide)
- **Step 1:** Determine the number of valence electrons.
- Hydrogen (H) has 1 valence electron, and there are 2 H atoms: 2 × 1 = 2.
- Sulfur (S) has 6 valence electrons.
- Total = 2 + 6 = 8 valence electrons.

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