An ethylene molecule contains ........... covalent bonds.

Explanation

To determine the number of covalent bonds in an ethylene molecule (C2H4), we can follow these steps:

### Step 1: Identify the molecular formula
The molecular formula of ethylene is C2H4. This indicates that the molecule consists of 2 carbon (C) atoms and 4 hydrogen (H) atoms.

**Hint:** Always start by writing down the molecular formula to understand the composition of the molecule.

### Step 2: Draw the Lewis structure
...