Which of following is an element?

Options

A. Carbon dioxide
B. Water
C. Iron
D. Soil

Answer

To determine which of the following options is an element, we will analyze each option based on the definition of an element. An element consists of only identical atoms.

### Step-by-Step Solution:

1. **Understanding Elements**: An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.

2. **Analyzing Carbon Dioxide (CO2)**:
- Carbon dioxide is made up of two different types of atoms: carbon (C) and oxygen (O).
- Since it contains more than one type of atom, carbon dioxide is not an element; it is a compound.

3. **Analyzing Water (H2O)**:
- Water is composed of two different types of atoms: hydrogen (H) and oxygen (O).
- Similar to carbon dioxide, water also contains more than one type of atom, making it a compound, not an element.

4. **Analyzing Iron (Fe)**:
- Iron is a metal and consists of only iron atoms.
- Since all the atoms in iron are identical, it qualifies as an element.

5. **Analyzing Soil**:
- Soil is a mixture of various substances, including minerals, organic matter, air, and water.
- It does not consist of only one type of atom or molecule, so it is neither an element nor a compound.

6. **Conclusion**: Among the given options, the only substance that is an element is iron (Fe).

### Final Answer:
The element from the given options is **Iron (Fe)**.

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