ˈ ̷ ̷ˌ ̷ ̷ noun
Usage: usually capitalized K
: the innermost shell of electrons surrounding an atomic nucleus and constituting the lowest available energy level for the electrons — compare l-shell , m-shell
ˈ ̷ ̷ˌ ̷ ̷ noun
Usage: usually capitalized K
: the innermost shell of electrons surrounding an atomic nucleus and constituting the lowest available energy level for the electrons — compare l-shell , m-shell
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012