Read the following scenarios and then answer the questions in the space provided below. Scenario 1. Magnesium is a shiny, flexible metal that can be burned in the presence of air. When it is burned, it produces a white powder that is no longer hiny or flexible. This white powder also has more mass than the original magnesium. Circle the choice that gives the best evidence that a chemical reaction occurred.. А. The molecules were separated into individual atoms. В. The mass of the magnesium changed. С. Smoke that was trapped between the magnesium atoms was given off. D. A new substance was formed. Explain your reasoning.

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