Essential Chemistry for IGCSE - Metals And Reactivity (Section 4 - No. 42)
What is the primary reason why alloys are stronger than pure metals?
Alloys have a higher melting point.
The different-sized atoms disrupt the regular arrangement of the atoms, making it harder for layers to slide.
Alloys have a lower density.
Alloys are more resistant to corrosion.
Explanation
The different-sized atoms in alloys disrupt the crystal lattice, hindering the movement of atoms and increasing strength.
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