Complete and balance the chemical equation:
`CH_2 = CH_2 + Br_2 to`

Explanation

To complete and balance the chemical equation for the reaction of ethene (CH₂=CH₂) with bromine (Br₂), we will follow these steps:

### Step 1: Write the Reactants
The reactants in this reaction are ethene (CH₂=CH₂) and bromine (Br₂).

### Step 2: Identify the Reaction Type
This reaction is an electrophilic addition reaction where bromine adds across the double bond of ethene.

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