The period in which the element P Q R belong
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Explanation:
Four elements P,Q,R and S belong to the third period of the Modern Periodic Table and have respectively 1,3,5 and 7 electrons in their outermost shells.
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Answer:
four ele P,Q,R belong to the third period of the modern period
table and have respectively 1,3,5 and 7 in thire outermost shells please mark me in brainlist
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