Final answer:
Chalk's classification as an ionic compound is characterized by its high melting point, which is a common property of ionic compounds. This property contributes to chalk's effectiveness for writing without melting or degrading easily. Chalk is also somewhat hard and brittle, although these traits can vary in this particular compound.
Explanation:
Understanding the Properties of Ionic Compounds
Chalk, primarily made of calcium carbonate (CaCO3), is classified as an ionic compound. One of the prominent properties of all ionic compounds, including chalk, is their high melting point. This characteristic makes them stable and suitable for various applications, including writing on chalkboards.
Among the options presented, the most relevant property of chalk as an ionic compound is its high melting point. Other properties of ionic compounds include:
- Hardness and brittleness: Although chalk is somewhat soft compared to other ionic compounds, these properties are typical of ionic materials.
- Inability to dissolve in water: Chalk is not particularly soluble, which ensures that it remains on the surface of the chalkboard without smearing easily.
- A multicolored appearance: While chalk can be produced in a variety of colors, this is not a general property of ionic compounds.
In conclusion, the high melting point makes chalk effective for writing on chalkboards, allowing it to endure repeated use without degrading.
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