MEDIUMMCQ SINGLEJEE Advanced ChemistryInorganic ChemistryPeriodic PropertiesModern Periodic Table
Without looking at the periodic table, select the elements of IIIA group of the periodic table (atomic numbers are given) :
A.3, 11, 19, 37
B.5, 13, 21, 39
C.7, 15, 31, 49
D.5, 13, 31, 49✓ Correct
Explanation
(n-1) d1-10 ns2 np1
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