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The p-Block Elements

Short Answer Type

431. The tendency to show-2 oxidation state diminishes from S to Po. Why?

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432. Why does oxygen not show an oxidation state of + 4 and + 6 like sulphur?

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433. Give one example each of the oxoacids of phosphorus in which the P has the oxidation state of (i) + 4 (ii) + 3.

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434. Name all the elements of group 16. Which elements is radioactive?

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435. Why are group 16 elements called chalcogens?

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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