How many valence electrons does hydrogen need to have a full first shell?

Well, the element of hydrogen only has 1 electron in its s sub shell, if it's s sub shell for the energy level of 1 were to be filled, there would need to be 2 electrons present in its shell to have a full first shell, as the s sub shell can only hold 2 electrons within it.

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Lanuel Lanuel · Answer 2 · 2021-10-22T21:12:12+02:00

The number of valence electrons that hydrogen needs to have a full first shell is: one (1) electron.

Valence electrons can be defined as the number of electrons present in the outermost shell of the atom of a chemical element.

Hydrogen is a chemical element that is found in group (1) of the periodic table because it has one (1) electron in its outermost shell.

This ultimately implies that, hydrogen has an atomic number of one (1) and it typically requires a single (one) valence electron to have a full first shell.

In conclusion, hydrogen would require just a single valence electron to reach a full octet state and it has only one proton and one electron in its nucleus.

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