He, Ne, Ar, Kr, Xe, RnVery unreactiveStable s2p6 octet*He is taken into consideration a noble gas since it has 2 electron in a full energy level!
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Atomic Radius

Atomic radius decreases from left to appropriate within a duration because of reliable nuclear charge . As you move from left to appropriate in a period, you are still in the same power level which means the electron is tho thesame street from the nucleus. As you go down a group, the atom radius increases due to the fact that you are including energy level that are farther far from the nucleus.

Smallest to Largest:

HeliumNeonArgonKryptonXenonRadon
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Ionic Radius

The Noble Gases execute not have actually an ionic radius . This is becausethey don"t form ions. Ions room charged particles, and atoms become charged particles once they acquire or shed electrons. Atoms only obtain or lose electrons in an attempt to develop an octet, or 8 valence electrons. Octets are an especially stable electron arrangements. Noble gases currently have 8 valence electron (except because that helium) and also are in really stable states. They have no require to obtain or lose electrons, so they space "happy".

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No ions = no ionic radii.


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Ionization Energy

Ionization power increases native left to appropriate within a period. Noble Gases have actually a very stable electron configuration, therefore, they have actually the highest possible amount of ionization power within their periods. It decreases down a family due to the fact that electrons farther native the cell nucleus are simpler to remove.

Largest to Smallest:

Helium (highest ionization level in the periodic table)NeonArgonKryptonXenonRadon
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Electronegativity
Electronegativity isthe capacity of an atom to get an electron.Every atom strives come gaineight electrons, i beg your pardon is the variety of atoms in the outermost power level of an atom. Due to the fact that the noble gases already haveeight electrons in their outer shells, they not wan"t come attract any type of more. Due to the fact that electronegativity actions the quantity of attraction in between an atom and an electron, noble gases perform not have actually electronegativity.

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