Essential Chemistry for IGCSE - Metals And Reactivity (Section 6 - No. 12)
What structural characteristic of alloys contributes most to their increased strength compared to pure metals?
The presence of non-metal atoms.
The irregular arrangement of atoms due to different atomic sizes.
The higher density of the alloy.
The smaller grain size.
Explanation
The irregular arrangement of atoms in an alloy, due to the differing sizes of the atoms used, disrupts the lattice structure, making it harder for atoms to slide past each other. This leads to increased strength.
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