What is electronic configuration of hydrogen and helium

Explanation:

Atomic number of hydrogen is 1 as it is the very first element of periodic table.

Hence, electronic configuration of hydrogen is .

On the other hand, second element of the periodic table is helium and its atomic number is 2. Helium is also known as a noble gas.

Therefore, electronic configuration of helium is .

Thus, we can conclude that electronic configuration of hydrogen and helium is and .

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