Chemistry

Problem

The data below were obtained for two unknown crystalline solids.

Property	Solid A	Solid B
Melting point (°C)	950	3 600
Electrical conductivity (solid)	none	none
Electrical conductivity (molten)	high	none
Mechanical behavior	brittle	extremely hard

Based on these observations, which classification for Solid A and Solid B, respectively, is most strongly supported? a) metallic; ionic b) covalent network; ionic c) ionic; covalent network d) molecular; ionic

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