Assertion (A): Hydrogen is the first element in the periodic table. Reason (R): It has electronic configuration 1s . | Hydrogen — Chem-Mantra | Chem-Mantra

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HydrogenmediumMCQ SINGLE

Question

Assertion (A): Hydrogen is the first element in the periodic table. Reason (R): It has electronic configuration 1s .

Answer: A

💡 Solution & Explanation

Hydrogen is the first element in the periodic table as it has the electronic configuration 1 1s .

💬

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