Question

the crystal structure of nabr is represented in the diagram above. which statement correctly compares crystalline nabr (s) to molten nabr (l) in terms of electrical conductivity? a crystalline nabr contains no freely moving electrons that could conduct an electrical current, whereas electrons can flow freely in molten nabr, which is a good conductor of electricity. b crystalline nabr and molten nabr both contain ions that are held in fixed positions due to strong electrostatic attractions among the ions, making neither a good electrical conductor. c crystalline nabr and molten nabr both contain na atoms that transfer electrons to br atoms in a chemical reaction, thus allowing them both to be good conductors of electricity. d crystalline nabr contains no freely moving electrons to conduct electricity, but molten nabr is composed of freely moving na + and br - ions, which allow it to be a good conductor of electricity.

Explanation:

In solid crystalline NaBr, the ions are in fixed positions and there are strong electrostatic attractions among the ions, so it does not conduct electricity. In molten NaBr, the ions are free - moving and can carry an electric current, making it a good electrical conductor. Option B correctly describes this in terms of the nature of ions and their movement in different states of NaBr.

Answer:

B. Crystalline NaBr and molten NaBr both contain ions that are held in fixed positions due to strong electrostatic attractions among the ions, making neither a good electrical conductor. However, in molten NaBr, the ions can flow freely, thus allowing them to be good conductors of electricity.