Identify, the elements with the following property
The metal which exists in liquid state at room temperature.

Explanation

To identify the metal that exists in a liquid state at room temperature, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Properties of Metals**:
- Metals are generally solid at room temperature, have a shiny appearance (lustrous), are good conductors of heat and electricity, and are usually hard.

2. **Identify Exceptions**:
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