Question

select the correct answer. several properties of the element magnesium are shown. which one is a chemical property? a. has a density of 1.7 g/cm³ b. melts at 650°c c. conducts electricity d. has a silvery-white color e. burns when exposed to heat

Explanation:

To determine a chemical property, we recall that chemical properties describe a substance's ability to undergo chemical changes (reactions) and form new substances. Physical properties (like density, melting point, electrical conductivity, color) can be observed without changing the substance's chemical identity.

• Option A (density), B (melting point), C (electrical conductivity), and D (color) are physical properties as they describe characteristics without a chemical reaction.
• Option E (burns when exposed to heat) involves a chemical reaction (combustion) where magnesium reacts with oxygen, so it is a chemical property.

Answer:

E. burns when exposed to heat