Identify, the elements with the following property
The metal which is an important constituent of limestone.

Explanation

To solve the question of identifying the metal that is an important constituent of limestone, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Composition of Limestone**:
- Limestone is primarily composed of calcium carbonate (CaCO3).

2. **Identify the Elements in Calcium Carbonate**:
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