Gold is found in pure state in nature but not the iron because gold is un-reactive metal, so it does not react with other element in normal condition but iron is reactive metal so it reacts with atmospheric oxygen in presence of moist (water) to form oxide.
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Metal pots are good for cooking because they have heat conductivity.
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Im not smart either but im pretty sure its D because its a pie chart so its asking how many and pie charts tell you how much something has
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