Noble gases, which have a completely filled valence shell, show little chemical activity. At ordinary temperature they do not show chemical reactivity. However, a large number of compounds of these gases particularly those of xenon and krypton have been prepared. Read the above passage and answer the following questions.
(i) Write one use of each Ar and Kr.
(ii) What are the values associated with the use of helium in artificial respiration in deep sea diving?
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what is Ar and Kr
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