First slide

Hydrogen

Question

Which of the following is/are correct statement(s)?
(I) Hydrogen is the first and the unique element in the periodic table.
(II) Electronic configuration of H-atom is 1s¹.
(III) Hydrogen gas has diatomic molecules.

Easy

A

Only (I) is correct
B

Only (II) is correct
C

(I) and (II) both are correct
D

(I), (II) and (III) all are correct

Solution

Due to its location in periodic table it is considered as with unique element and with electronic configuration as 1S¹ and exists as H₂ in molecular state

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