silk is soft : iron is
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hard or tough is the answer .
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Answer:
(Look down)
Explanation:
"Iron is a chemical element with symbol Fe and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is by mass the most common element on Earth, right in front of oxygen, forming much of Earth's outer and inner core.''
- Google Wiki unknown date
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