题目

CHEM 110 Section 3 (PM) SP25 Pre-Lecture 13 Quiz C06-1-3

多项选择题

Which of these properties describe the molecular level structure of ionic compounds? [Select all that apply.]

选项

A.low electrical conductivity as solids

B.hard but brittle

C.distinct +/− ions

D.strong omnidirectional electrostatic bonds

E.“infinite” crystal lattice

F.soluble only in polar solvents (i.e. water)

G.very high melting and boiling points

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思路分析

Question restatement: Which of these properties describe the molecular level structure of ionic compounds? Select all that apply. Option 1: low electrical conductivity as solids Reasoning: In the solid state, ions are locked in fixed positions within a lattice, so there is no free movement of charged particles to carry current. This makes ionic solids poor conductors of electricity as solids. This statement correctly describes a property tied to the solid lattice. Option 2: hard but brittle Reasoning: The rigid ionic lattice resists deformation, but when enough stress disrupts the orderly arrangement, ions can like-charge repel and the lattice fractures along planes. T......Login to view full explanation