"Alice and Marge are studying the properties of matter. The girls cut some silver-colored magnesium sheets into 3-inch long strips and then put one strip each into test tubes: one containing water and one containing acid. Nothing happened when they added the magnesium to the water. In the acid, bubbles formed and the test tube felt much warmer."

Based on the girls' experiment, what is a chemical property of magnesium?
A) Magnesium is a metal.
B) Magnesium reacts in acids.
C) Magnesium is solid at room temperature.
D) Magnesium is malleable and can be shaped into strips.

I'm assuming the answer for this is "B." I'm very confused at the moment.

A, C, and D are physical properties

B is chemical

You are correct, the chemical property of magnesium exhibited in this experiment is that it reacts in acids. Let me explain how we can arrive at this conclusion based on the information provided.

In the experiment described, Alice and Marge observed that when they added the magnesium strip to water, nothing happened. This suggests that magnesium does not react with water. However, when they added the magnesium strip to the acid, bubbles formed and the test tube felt warmer.

From this information, we can conclude that a reaction occurred between the magnesium and the acid because bubbles formed and heat was produced. These observations indicate that a chemical change took place, which is the defining characteristic of a chemical property.

Therefore, the correct answer is B) Magnesium reacts in acids.