Four known elemental samples and one unknown sample were run through a spectrometer. The unknown was a mixture of two elements. The experimental results are below. Using the evidence provided make a claim about which two elements make up the unknown sample I need it quickly please!!

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e