In terms of atomic radius, which is the correct order of elements when ordered largest to smallest?
(5 Points)
K, Ca, Ge, Se
Se, K, Ca, Ge,
Ge, Ca, K, Se
K, Ca, Se, Ge

sodium (na), for example, has one electron in its valence shell. this is an unstable state because that valence shell needs eight electrons to be full. in order to fill its valence shell, find a way to add seven electrons to its valence shell

i don,t know so just answer mine