Identify whether the following are elements or compounds or mixtures. Give proper justification.
Sand

Explanation

To determine whether sand is an element, compound, or mixture, we can follow these steps:

### Step 1: Define the Terms
- **Element**: A pure substance that cannot be broken down into simpler substances by chemical means. Examples include gold (Au), oxygen (O), and hydrogen (H).
- **Compound**: A substance formed when two or more elements are chemically bonded together. For example, water (H₂O) is a compound made of hydrogen and oxygen.
- **Mixture**: A combination of two or more substances that are not chemically bonded. The components of a mixture can be separated by physical means. Examples include air and salad.

### Step 2: Analyze Sand
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