Question

chemistry unit 1b practice ws#2 name daniya turner section 3.1 properties of matter 1. classify each of the following as a physical or chemical property. a. iron and oxygen form rust. b. iron is more dense than aluminum. c. magnesium burns brightly when ignited. d. oil floats on water. e. mercury melts at -39°c f. a banana turns brown in the fridge

Explanation:

Step1: Recall definition of physical property

A physical property can be observed or measured without changing the substance's chemical identity.

Step2: Recall definition of chemical property

A chemical property is observed when a substance undergoes a chemical change.

Step3: Analyze a

Iron and oxygen forming rust is a chemical change, so it's a chemical property.

Step4: Analyze b

Density comparison is a physical - observable property without chemical change, so it's a physical property.

Step5: Analyze c

Magnesium burning is a chemical reaction, so it's a chemical property.

Step6: Analyze d

Oil floating on water is about physical state and density relationship without chemical change, so it's a physical property.

Step7: Analyze e

Melting point is a physical property as it's a characteristic of the substance without chemical change.

Step8: Analyze f

A banana turning brown is due to a chemical reaction (oxidation), so it's a chemical property.

Answer:

a. Chemical
b. Physical
c. Chemical
d. Physical
e. Physical
f. Chemical