Rank the following groups in order of decreasing priority for R, S configuration.
`-Cl,-CH_(3),-SH,-OH`

Explanation

To rank the groups -Cl, -CH₃, -SH, and -OH in order of decreasing priority for R, S configuration, we will follow the Cahn-Ingold-Prelog (CIP) priority rules. Here’s a step-by-step solution:

### Step 1: Identify the Atomic Numbers
First, we need to identify the atomic numbers of the first atoms in each group:
- For -Cl (Chlorine), the atomic number is 17.
- For -CH₃ (Methyl), the first atom is Carbon (C), with an atomic number of 6.
- For -SH (Thiol), the first atom is Sulfur (S), with an atomic number of 16.
- For -OH (Hydroxyl), the first atom is Oxygen (O), with an atomic number of 8.
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