How are physical and chemical changes similar?

Question

Mercury · Answer

answer choices (please post these next time)

Neither can change the number of atoms of each element that are present.
Neither can cause chemical bonds to break.
Neither can result in a phase change.
Neither can cause a substance to give off heat or light.

Mercury · Answer

thoughts?

if no answers stick out to you as possible choices, try using process of elimination

for example ---> "neither can cause a substance to give off heat or light" is false, as chemical changes *can* cause substances to give off heat or light. so we would eliminate that choice as a possibility. repeat this logic and evaluate the rest of the choices.