Let n = any number greater than 1
ns2np6
Such as 3s23p6
Cl-
Pure sodium is very reactive and therefore not chemically stable.
chemically stable: very few things will react with it chemically unstable: many things will react with it and it can react violently ur mr.notso awsome
They achieve stable configuration by sharing their electrons in their outermost shell.
Argon has completely filled valence shell, has stable electronic configuration. hence it is chemically inert and does not react with other elements and hence has no biological importance.
they are generally chemically inert
Cl-
In order for an atom to be chemically stable it must have 8 valence electrons.
Cl-1.
Helium has completely filled orbitals and is hence chemically inert.
they are stable
Pure sodium is very reactive and therefore not chemically stable.
It is because they are chemically stable.
molecule
Noble gases have completely filled outer most shell and have stable electronic configuration. They are chemically inert and exist as monoatomic species.
Noble gases have completely filled orbitals / energy levels. They generally have 8 valence electrons (helium has only 2) and have stable electronic configuration. Hence they are chemically inert and generally donot form compounds under normal conditions.
Noble gases are chemically stable because they have completely filled electron orbitals. They generally have 8 valence electrons (helium has only 2) and therefore have a stable electronic configuration.