He, Ne, Ar, Kr, Xe, RnVery unreactiveStable s2p6 octet*He is considered a noble gas since it has 2 electron in a full power level!

Atomic Radius

Atomic radius decreases from left to appropriate within a period because of reliable nuclear fee . As you relocate from left to right in a period, you space still in the same power level which way the electron is tho thesame distance from the nucleus. As you go down a group, the atomic radius increases because you are adding energy levels that room farther away from the nucleus.

Smallest come Largest:


Ionic Radius

The Noble Gases perform not have an ionic radius . This is becausethey don"t form ions. Ions space charged particles, and atoms become charged particles when they obtain or lose electrons. Atom only get or shed electrons in an effort to create an octet, or 8 valence electrons. Octets are an especially stable electron arrangements. Noble gases already have 8 valence electron (except for helium) and are in very stable states. They have no require to acquire or lose electrons, so they room "happy".

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No ions = no ionic radii.

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Ionization Energy

Ionization power increases from left to right within a period. Noble Gases have actually a really stable electron configuration, therefore, they have the highest amount of ionization power within your periods. That decreases down a family since electrons farther indigenous the cell core are much easier to remove.

Largest to Smallest:

Helium (highest ionization level in the periodic table)NeonArgonKryptonXenonRadon

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Electronegativity isthe capacity of one atom to obtain an electron.Every atom strives to gaineight electrons, i m sorry is the number of atoms in the outermost power level of an atom. Due to the fact that the noble gases currently haveeight electron in their outer shells, they dont wan"t come attract any more. Because electronegativity actions the quantity of attraction in between an atom and an electron, noble gases do not have actually electronegativity.

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Noble Gases are incredibly unreactive. This is due to the fact that non-metals gain electrons. Since the noble gases carry out not must gain any type of electrons due to the fact that of your "stable octet", they don"t react often. The most reactive non-metal would be the one v the fewest electrons to gain, 7A, and also the one with the smallest radius due to the fact that the new electron would be tightly held by the proton in the nucleus (F is the mostreactive non-metal).
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