Question

sodium and chlorine react to form an ionic compound. what is a physical property of the sodium before the reaction? the sodium has a very low melting point. the sodium would not conduct electricity. the sodium has a shiny luster. the sodium is brittle.

Explanation:

Sodium is a metal. Metals generally have a shiny luster (metallic luster). Sodium has a relatively low melting point (97.72°C), but it is not "very low" compared to some other substances. Sodium, being a metal, can conduct electricity due to the presence of free - moving electrons. Metals are malleable and ductile, not brittle. Brittle is a property more associated with non - metals or ionic compounds in solid form (but the question is about sodium before reaction).

Answer:

The sodium has a shiny luster.