Categorize the following list of elements.
Platinum, Copper, Hydrogen, Iron
The elements can be categorized as follows:

**Metals:** Platinum, Copper, Iron

**Non-Metals:** Hydrogen
Complete the following task based on the instruction and optional input provided.### Instruction:
Categorize the following list of elements.

### Input:
Platinum, Copper, Hydrogen, Iron

### Output:
The elements can be categorized as follows:

**Metals:** Platinum, Copper, Iron

**Non-Metals:** Hydrogen