Draw the Lewis structures of the following species :
`CH_3 CH_2 CH_3`

Explanation

To draw the Lewis structure of the molecule propane (CH₃CH₂CH₃), we can follow these steps:

### Step 1: Identify the number of atoms and their valence electrons
- Propane consists of 3 carbon (C) atoms and 8 hydrogen (H) atoms.
- Each carbon atom has 4 valence electrons, and each hydrogen atom has 1 valence electron.

### Step 2: Calculate the total number of valence electrons
- Total valence electrons = (Number of C atoms × Valence electrons of C) + (Number of H atoms × Valence electrons of H)
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