- Iron is always magnetic
- A magnet attracts magnetic metals through magnetism
- Therefore, a magnet will attract iron

- Sand is always nonmagnetic
- A magnet will not attract nonmagnetic materials
- Therefore, a magnet will not attract sand

- A magnet will attract iron
- A magnet will not attract sand
- The mixture is made of unknown particles and sand
- So, iron is likely the element attracted by the magnet

So, iron is likely the element attracted by the magnet
Question: In a mixture, a magnet is used to separate some particles from sand. The dark particles are most likely made of which element?
Context: - Sand is always nonmagnetic 
- The mixture is made of unknown particles and sand 
- A magnet will not attract nonmagnetic materials 
- Iron is always magnetic 
- A magnet attracts magnetic metals through magnetism