Elements with complete outer shells are Noble Gases.
All the Noble/Inert gasses. However, Helium (He) has a complete outer shell of only TWO(2) electrons. The other noble gases all have a complete octet (outer) shall, of EIGHT(8) (Octet) electrons.
All of the elements in group 18 have complete outer shells, and are called the noble gases. They are helium, He, neon, Ne, argon, Ar, krypton, Kr, xenon, Xe, and radon, Rn.
because they have outer electrons than can merge with other elements. all elements want to have full outer electron shells, and they only have a few outer electrons.
there are two electrons in magnesiums outer shell, and 6 in oxygens. In magnesium oxide the electrons from Mg are donated in order to give both elements complete outer shells
No reactive elements always have partially filled shells- never full outer shells. Because they are partially filled they are less stable and want to react. If they had full shells they would be very stable.
Group 0
All the Noble/Inert gasses. However, Helium (He) has a complete outer shell of only TWO(2) electrons. The other noble gases all have a complete octet (outer) shall, of EIGHT(8) (Octet) electrons.
protons
Elements with full outer shells, the noble gas elements, are located in the column at the extreme right of the periodic table.
The least reactive elements are the noble gases (helium, neon, krypton, argon, xenon). They each have a complete outer electron shell (two electrons for helium, eight electrons in the outer shell of the other noble gases). Chemical reactions take place in ways that result in making outer electron shells more complete (or for transition state elements, it can also make inner shells more complete), so if the outer electron shell is already complete, there is no basis for a chemical reaction.
The noble gases (helium, neon, krypton, xenon, radon) have complete outer electron shells, and the halogens (fluorine, chlorine, bromine, iodine, astatine) have almost complete outer electron shells. Note that the chemical properties of an element with a complete outer shell are tremendously different from the chemical properties of an element with an almost complete outer shell.
A group of elements that rarely combine with other elements because they already have eight electrons in the outer shells is a Noble Gas
The outer energy shells in the group 18 elements, called the noble gases, have a complete octet of ns2np6, where n is the highest energy level. The only exception is helium, which has an outer energy shell of 1s2.
All of the elements in group 18 have complete outer shells, and are called the noble gases. They are helium, He, neon, Ne, argon, Ar, krypton, Kr, xenon, Xe, and radon, Rn.
The table was organized so that elements of similar properties are in the same group. What (partly) determines reactivity is the number of electrons an atom has in it's ground state. . Within the atom electrons are organized in shells. Atoms are stable when they have 8 electrons in their outer shell (for hydrogen and helium it is 2 electrons.) . Elements of: Group 18 have 8 electrons in their outer shells Group 17 have 7 electrons in their outer shells Group 16 have 6 electrons in their outer shells Group 15 have 5 electrons in their outer shells Group 14 have 4 electrons in their outer shells Group 13 have 3 electrons in their outer shells Groups 3-12 have varied number of electrons in their outer shells Group 2 have 2 electrons in their outer shells Group 1 have 1 electron in their outer shells
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
The Noble Gas are Non-Reactive, they do not form bonds with other Elements. ***** They don't form bonds at all because their outer shells are complete.