Categorization Into Early Middle Ending Elements

Categorization into Early, middle & ending elements

graph TB A[Chemistry] B[Early Elements] C[Middle Elements] D[Ending Elements] A --> B A --> C A --> D B --> E[Element 1] B --> F[Element 2] C --> G[Element 3] C --> H[Element 4] D --> I[Element 5] D --> J[Element 6]