State one relevant observation for the reaction
A piece of sodium metal is put into ethanol at room temperature.

Explanation

To answer the question regarding the observation when a piece of sodium metal is put into ethanol at room temperature, we can break down the solution into clear steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants in this reaction are sodium metal (Na) and ethanol (C2H5OH).

2. **Understanding the Reaction**:
...