Which of the following that are examples of a physical property of matter. Select all that apply. Iron (Fe) combines with Oxygen (O) to form rust.

The apple is red in color.

Copper (Cu) conducts electricity.

An apple oxidizes (turns brown) once it is cut and exposed to Oxygen (O).

Nickel (Ni) is magnetic.

Magnesium (Mg) combusts when exposed to Oxygen (O).

Water boils at 100ºC.

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.