Which Would You Expect to Have a Higher Melting Point

question 80

Multiple Choice

Which would you expect to have a higher melting point: sodium chloride,NaCl,or aluminum oxide, AL₂O₃?

• A)The aluminum oxide has a higher melting point because it is a larger molecule and has a greater number of molecular interactions.
• B)NaCl has a higher melting point because it is a solid at room temperature.
• C)The aluminum oxide has a higher melting point because of the greater charges of the ions,and hence the greater force of attractions between them.
• D)The aluminum oxide has a higher melting point because of the covalent bonds within the molecule.

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Definitions:

Magmas

Molten rock material beneath or within the Earth's crust, from which igneous rock is formed through cooling and solidification.

Mid-ocean Ridges

Underwater mountain ranges formed by plate tectonics, where new oceanic crust is created through volcanic activity along divergent plate boundaries.

Ocean Plates

Large pieces of the Earth's crust that move over the partially molten outer layer, specifically those under the oceans.

Diverge

To move or extend in different directions from a common point, often used in reference to plate tectonics or paths.