All of the following are properties of sodium. Which one is a physical property of sodium A) It's surface turns black when first exposed to air. B) It is a solid at 25^$\circ$C and changes to a liquid when heated to 98^$\circ$C. C) When placed in water it sizzles and a gas is formed. D) When placed in contact with chlorine it forms a compound that melts at 801^$\circ$C. E) Sodium is never found as the pure metal in nature.

Question

Quizplus · Accepted Answer

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. The fact that sodium is a solid at 25 degrees Celsius and changes to a liquid when heated to 98 degrees Celsius is a physical property. Choices A, C, and D describe chemical reactions and changes in composition, which are not physical properties. Choice E describes a generalization about the occurrence of sodium in nature, but it is not a specific characteristic of sodium itself.

All of the Following Are Properties of Sodium ∘\circ∘ C and Changes to a Liquid When Heated to 98

All of the Following Are Properties of Sodium $\circ$ C and Changes to a Liquid When Heated to 98