Valence shell is the __________ shell of every element.

Correct option is D

The correct answer is (d) Outermost.
· The valence shell is the outermost shell of an atom. It is the shell that contains the valence electrons, which are responsible for an atom's chemical properties and its ability to bond with other atoms. The number of electrons in the valence shell determines how an element reacts chemically.
Information Booster:
· Valence electrons: Electrons located in the outermost shell (valence shell) of an atom, which participate in chemical bonding.
· Chemical bonding: The valence electrons are involved in the formation of bonds with other atoms during chemical reactions.
· Stability: Atoms with a full valence shell are typically more stable and less reactive (e.g., noble gases).
· Periodic table: Elements in the same group have the same number of valence electrons, which explains their similar chemical properties.