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

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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