Write the monomer units of bakelite.

Explanation

To determine the monomer units of Bakelite, we need to identify the primary reactants involved in its synthesis. Bakelite is a type of phenolic resin, and its formation involves the polymerization of two main compounds: phenol and formaldehyde. Here's a step-by-step breakdown of the process:

### Step 1: Identify the Monomers
The two monomer units that combine to form Bakelite are:
- **Phenol (C6H5OH)**
- **Formaldehyde (CH2O)**

### Step 2: Understand the Reaction Mechanism
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