Calculate the oxidation number of all the atoms in the following species.
`(NH_(4))_(2)SO_(4)`

Explanation

To calculate the oxidation number of all the atoms in the species \((NH_4)_2SO_4\) (ammonium sulfate), we will analyze the oxidation states of each element step by step.

### Step 1: Identify the components of the compound
The compound \((NH_4)_2SO_4\) consists of:
- Two ammonium ions \((NH_4^+)\)
- One sulfate ion \((SO_4^{2-})\)

### Step 2: Calculate the oxidation number for the ammonium ion \((NH_4^+)\)
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