Stable Lons quick check. Which element does not have the same number of electrons in it’s outermost shell as the other elements in its group?

Answer 1

In general, elements in the same group (vertical column) of the periodic table typically have the same number of electrons in their outermost shell, also known as valence electrons. However, hydrogen, which is located in Group 1 (alkali metals), does not have the same number of valence electrons as the other elements in its group. While alkali metals have one electron in their outermost shell, hydrogen is a non-metal with a single electron in its shell, but it doesn't behave like an alkali metal, particularly in terms of its chemical properties.