Physics, 08.06.2021 07:40 henryzx900
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 the unknown substance?
A. metalloid
B. metal
C. nonmental
D. halogen
Answers: 3
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A teacher performs a demonstration to show the properties of an unknown substance. The teacher cuts...
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