Robert is testing two objects. Each object is composed of a single element unknown to Robert. Which of the following procedures could Robert SAFELY use to identify these elements.
-He could measure the objects mass and volume in order to calculate each objects' density. Then, compare his densities to a elemental density chart.
-He could light each element on fire to see if they have flammability properties.
-He could drop each object off a building and see if they break, and or how they break.
-He could guess what element each object is made of.
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Robert is testing two objects. Each object is composed of a single element unknown to Robert. Which...
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