Explain classification of matter based on it molecular composition with suitable examples.

Explanation

### Step-by-Step Solution:

1. **Understanding Matter**: Matter is anything that has mass and occupies space. It can be classified based on its molecular composition into two main categories: **Pure Substances** and **Mixtures**.

2. **Pure Substances**: A pure substance consists of only one type of particle. It can be further divided into:
- **Elements**: These are substances that cannot be broken down into simpler substances by chemical means. Elements consist of identical atoms. Examples include:
- **Hydrogen (H)**
- **Oxygen (O)**
...