PREVIOUSLY ASKED IN:
WBPSC Miscellaneous Preliminary 2023
Answer
Tin
Explanation
Bronze is an alloy consisting primarily of copper (\\( Cu \\)), commonly with about 12% tin (\\( Sn \\)) and often with the addition of other metals. The addition of tin makes bronze much harder than pure copper. It was so significant in human history that an entire era is named the 'Bronze Age'.
Key Points
- > Components: Copper (\\( Cu \\)) and Tin (\\( Sn \\)).
- > Copper chemical symbol is \\( Cu \\), Tin is \\( Sn \\).
- > Bronze is much harder and more durable than plain copper.
- > Brass is another copper alloy, made with Zinc (\\( Zn \\)).
- > Stainless steel is an alloy of Iron, Chromium, and Nickel.
- > Bronze medals are awarded for third place in sports.
- > Widely used for statues, musical instruments, and bearings.
Additional Information
Common Alloys
| Alloy | Composition | Uses |
|---|---|---|
| Bronze | \\( Cu + Sn \\) (Tin) | Statues, Coins |
| Brass | \\( Cu + Zn \\) (Zinc) | Utensils, Instruments |
| German Silver | \\( Cu + Zn + Ni \\) | Resistance coils |
| Gun Metal | \\( Cu + Sn + Zn \\) | Gears, Castings |
Memory Tips
- Remember that Bronze has a 'z' but doesn't contain Zinc (it has Tin). Brass doesn't have a 'z' but contains Zinc.