Chemistry, 04.06.2021 17:10, mophillips20202

A teacher performs a demonstration to show the properties of an unknown substance. The teacher cuts off a piece of gray shiny substance and drops it in water. The substance floats and reacts violently with the water. Based on this information, what type of element is the unknown substance?

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A teacher performs a demonstration to show the properties of an unknown substance. The teacher cuts...