What is the observation from the Law of Conservation of Matter Lab that indicated a chemical change took place?

A. The mixture released light
B. There was a production of gas
C. The mixture of baking soda and vinegar gave off heat
D. The mixture of vinegar and baking soda turned green

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.