MEDIUMMCQ SINGLEJEE Advanced ChemistryInorganic ChemistryPeriodic PropertiesModern Periodic Table
The electronic configuration of the element which is just above the element with atomic number 43 in the same group is ............
A.1s2 2s2 2p6 3s2 3p6 3d5 4s2✓ Correct
B.1s2 2s2 2p6 3s2 3p6 3d5 4s3 4p6
C.1s2 2s2 2p6 3s2 3p6 3d6 4s2
D.1s2 2s2 2p6 3s2 3p6 3d7 4s2
Explanation
The element with atomic number 43 is Technetium (Tc), whose electronic configuration is, 5 2 4 5 Kr d s So, Tc belongs to the 5th period and 7th group of the periodic table. Therefore, the element just above Tc belongs to the 4th period and 7th group with the electronic configuration 2 2 6 2 6 5 2 1 2 2 3 3 3 4 s s p s p d s or 5 2 3 4 Ar d s which is Manganese [Mn]
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