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Chemistry · L4 · Classifying an unknown crystalline solid by its properties

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A property-based decision flow (conductivity, hardness, melting point) for classifying an unknown crystalline solid into one of the four bonding classes.

by @openstemUpdated Chemistry
Unknown crystalline solidDoes it conduct electricityas a solid?Metallic(delocalized electron sea)e.g. copper, ironIs it extremely hard witha very high melting point?Covalent network(one giant lattice)e.g. diamond, quartzDoes it melt at a lowtemperature (often < 300 °C)?Molecular(weak intermolecular forces)e.g. ice, dry ice, iodineIonic(electrostatic attraction)e.g. NaCl, MgOYesNoYesNoYesNo

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