compounds
The noble gases is the most stable group of elements. They have their outer electron energy levels full, but the number of electrons vary according to which noble gas it is. They are group 18 on the periodic table.
Elements with complete outer energy levels are noble, which means that they will not bond with other elements. They are not (normally) reactive.
If by energy levels you mean shells then Beryllium (Be) is in the second group and the second Period.
Group 18 or the noble gases.
Beryllium and magnesium have two electrons in their outermost energy level, as do all Group 2 elements.
The noble gases is the most stable group of elements. They have their outer electron energy levels full, but the number of electrons vary according to which noble gas it is. They are group 18 on the periodic table.
Elements with complete outer energy levels are noble, which means that they will not bond with other elements. They are not (normally) reactive.
group 18
Some elements are stable on their own because they have a complete outer energy level. These elements are called noble gases. Hydrogen and Helium have a complete energy level with two electrons and all of the other elements are stable with eight. When an element doesn't have a complete outer energy level it is stable in a compound. This is because it is being combined with another element to complete it's energy level.
Nobel gases. They are stable elements in that they have complete outer shells, but they can be made to react with other elements to form compounds. For elementary chemistry, however, they can be considered inert.Ray
Group 18 elements have a stable octet.
STUDY
Group 8
The elements can only be stable when it complete is octate in its outer most orbit has 8 electrons in its outer most orbit by gaining or losing energy
noble gases or group 1
The inert or noble gases have a stable full outer shell of electrons which is why they are so unreactive.
Noble gases.