MEDIUMMCQ SINGLEJEE Mains ChemistryInorganic ChemistryHydrogenIntroduction to Hydrogen Assertion (A): Hydrogen is the first element in the periodic table. Reason (R): It has electronic configuration 1s .
A.Both A and R are correct; R is the correct✓ Correct
B.Both A and R are correct; R is not the correct
C.A is correct; R is incorrect
D.R is correct; A is incorrect.
Explanation
Hydrogen is the first element in the periodic table as it has the electronic configuration 1 1s .
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