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MHT CET Chemistry question

ChemistryClassification of Elements and Periodicity in PropertiesMHT CET

The atomic numbers of elements X, Y and Z are 19, 21 and 25 respectively. The number of electrons present in the M-shell of these elements follow the order

Answer: (C)

Solution

X (K, ) is 2, 8, 8, 1 giving 8 in the M-shell; Y (Sc, ) is 2, 8, 9, 2 giving 9; Z (Mn,

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Question ID VK-060544