One
Oxygen atoms need to share or gain two electrons in order to achieve a stable electron configuration.
Losing an electron cesium has a noble gas configuration.
Two electrons.
They achieve stable configuration by sharing their electrons in their outermost shell.
Lithium has one valence electron. It is much easier for an atom to lose one electron than gain seven more. Lithium looses this one electron to achieve a full outer shell (the next inside shell is full).
Selenium should gain two electrons and lose six electrons to achieve a noble gas electron configuration.
They achieve the electron configuration of a noble gas.
A stable electron configuration.
Oxygen atoms need to share or gain two electrons in order to achieve a stable electron configuration.
Losing an electron cesium has a noble gas configuration.
nitrogen has 5 valence electrons. It should gain 3 electrons to achieve a noble gas configuration.
Two electrons
Two electrons.
They achieve stable configuration by sharing their electrons in their outermost shell.
Chemical properties depend on electron configuration. By either gaining or losing electrons, an atom changes its electron configuration and therefore its chemical properties also change.The atoms of an element will react to achieve a noble-gas configuration. The atoms will either gain or lose electrons to achieve such a configuration.
Only three electrons.
Lithium has one valence electron. It is much easier for an atom to lose one electron than gain seven more. Lithium looses this one electron to achieve a full outer shell (the next inside shell is full).