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← ScienceWhich outcome occurs when applying shear stress to a brittle crystal of sodium chloride?
A)Electronegativity differences cause crack propagation✓
B)Covalent bond distortion results in yielding
C)Metallic character induces plastic deformation
D)Hydrogen bonding facilitates grain boundary slip
💡 Explanation
The crystal fractures because electronegativity differences in NaCl lead to coulombic repulsion during shear. This causes catastrophic crack propagation through the ionic lattice, therefore fracture occurs rather than deformation arising from covalent or hydrogen bonding mechanics.
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