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Physics 10 Online
OpenStudy (rebeccapink6398):

Suppose you have two minerals. One mineral fractures into rough pieces, and a second mineral breaks into pieces with smooth surfaces. What does this indicate? A. The second mineral is harder than the first mineral. B. The two minerals have a different arrangement of their atoms. C. Only the second mineral has crystalline structure. D. The second mineral is older than the first mineral

OpenStudy (kr79):

It's B

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