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QUESTION 20 What are the valence electrons for Mn? O 405 O 452 O 452 405 452 305 O 305
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Ans-42 3d Lotract optian the Reason Manganese is a transition metal Tib atom numbey (z)is 25 Tts electronic Lonthiquahianis Lnot posible can not be idad betore 42 and 3d because d y2 is not abs posible number of electrrons is 25 because tota 42 diot

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