Question

which is a chemical property of copper?
a) reacts in air to form a green layer
b) has a reddish color in pure form
c) is a solid at room temperature
d) has a boiling point of 2567 °c

Explanation:

A chemical property involves a chemical change. Copper reacting in air to form a green - layer (verdigris, a copper carbonate - hydroxide compound) is a chemical change. Color, state at room temperature, and boiling point are physical properties.

Answer:

A. reacts in air to form a green layer