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The p-Block Elements
Chalcogens means ore forming, as most of the ores in the earth crust are either oxides or sulphides, group 16 elements are called chalcogens. for example:
Oxygen is the most abundant of all the elements on earth. Oxygen forms about 46.6% by mass of earth’s crust. Dry air contains 20.946% oxygen by volume.
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Complete the following reactions
(i) C2H4 + O2 →
(ii) 4Al + 3O2 →
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