[Science Form 3] Reactions

Most metals react with oxygen to form metal oxide.

Metal + Oxygen -------> Metal oxide

Eg:

• Zinc + Oxygen -------> Zinc oxide
• Aluminium + Oxygen -------> Aluminium oxide

Most metals react with sulphur to form metal sulphide

Metal + Sulphur -------> Metal sulphide

Eg:

• Zinc + Sulphur -------> Zinc sulphide
• Iron + Sulphur -------> Iron sulphide

Metal + sulphide -------> Final product

1. Magnesium + Sulphur ----heat---> Magnesium sulphide
2. Aluminium + Sulphur ----heat---> Aluminium sulphide
3. Zinc + Sulphur ----heat---> Zinc sulphide
4. Iron + Sulphur ----heat---> Iron sulphide

Metal + oxide -------> Final product

1. Magnesium + Oxygen ----heat---> Magnesium oxide
2. Aluminium + Oxygen ----heat---> Aluminium oxide
3. Zinc + Oxygen ----heat---> Zinc oxide
4. Iron + Oxygen ----heat---> Iron oxide