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Chem Chemistry

ChemistryNEB 2076 (old course)

Distinguish between alloys and amalgams giving an example of each. [1+1]

2

Answer

· Based on the official syllabus and past papers
Updated 
| **Alloys**                          | **Amalgams**                          |
|-------------------------------------|---------------------------------------|
| **Definition:** Mixtures of metals with other metals or non-metals (e.g., carbon, silicon) to improve properties like strength, hardness, or resistance. | **Definition:** Alloys where **mercury (Hg)** is the primary metal mixed with other metals or alloys. |
| **Composition:** Can include metals + non-metals (e.g., steel = Fe + C). | **Composition:** Always contain **mercury** (e.g., Hg + Ag, Hg + Au). |
| **Example:** **Steel** (Fe + C + Mn). | **Example:** **Dental amalgam** (Hg + Ag + Sn). |
| **Purpose:** Enhance mechanical/chemical properties (e.g., rust resistance, durability). | **Purpose:** Used in dental fillings, thermometers, or scientific equipment due to mercury’s low melting point. |

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