materials metals and nonmetals plz ..
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here is you answer sis and best of luck because tomorrow is your exam
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iron - shiny - appearance, very hard - hardness
coal - dull - appearance, not very hard - hardness
Sulphur - dull - appearance, not very hard - hardness
aluminum - dull - appearance, very hard - hardness
copper - shiny - appearance, very hard - hardness
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