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Q.
A number of elements are available in earth’s crust but most abundant elements are_________.
General Principles and Processes of Isolation of Elements
Solution:
Among a number of elements which are available in earth crust, the most abundant elements are aluminium and iron. Aluminium is third most abundant element in earth crust. i.e., $8.3 \%$ by weight while iron present in earth crust with $4.2 \%$ by weight. Copper and silver are also found in earth crust but their abundance percentage is low.