Properties of Solids: Ionic, Molecular, Metallic

Front

What are the properties of ionic solids?

Back

Ionic solids have high melting and boiling points, are hard and brittle, do not conduct electricity in solid form, but conduct electricity when melted or dissolved in water.

Front

What are the properties of molecular solids?

Back

Molecular solids have low melting and boiling points, are usually soft, and do not conduct electricity in any form.

Front

What are the properties of metallic solids?

Back

Metallic solids have high melting and boiling points, are malleable and ductile, and conduct electricity and heat well due to the presence of delocalized electrons.

Front

What is the significance of melting point in identifying solid types?

Back

The melting point can help distinguish between ionic, molecular, and metallic solids, as ionic solids typically have high melting points, while molecular solids have low melting points.

Front

How does electrical conductivity differ between solid and aqueous states for ionic compounds?

Back

Ionic compounds do not conduct electricity in solid form due to fixed ions, but they conduct electricity when dissolved in water (aqueous) because the ions are free to move.

Front

What is an example of a molecular solid?

Back

An example of a molecular solid is glucose (C6H12O6), which is soft and has a low melting point.

Front

What is an example of an ionic solid?

Back

An example of an ionic solid is magnesium chloride (MgCl2), which has a high melting point and conducts electricity when dissolved in water.

Front

What is the best method to test if a substance is ionic?

Back

The best method is to test the electrical conductivity of an aqueous solution of the substance.

Front

What is the difference between NaCl(s) and NaCl(aq)?

Back

NaCl(s) is solid sodium chloride, which does not conduct electricity, while NaCl(aq) is sodium chloride dissolved in water, which conducts electricity.

Front

What does it mean for a solid to be brittle?

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Brittleness refers to a material's tendency to break or shatter easily when subjected to stress, a common property of ionic solids.