Identify indicators of a chemical reaction. Check all of the boxes that apply.
Two solids are combined. After a small amount of
heat is applied, an explosion occurs and smoke is
released.
emission of heat
emission of light
formation of precipitate
formation of gas

PLZ HELP

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?