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Ores and Minerals

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Question

Look at the location of elements A, B, C and D in the following periodic table:
Predict whether these elements are likely to be found in nature as carbonates, oxides, sulphides or in uncombined state.

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Solution

A = Cr
B = Zn
C = Sr
D = Pt
So A exits as oxide,
B as sulphide
C as carbonate and
D as free metal

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