Why are noble gases (Group 18) especially stable?Group of answer choicesThey have half-filled valence shellsThey have fully filled valance shellsThey have empty valence shellsThey have even number of electrons

The elements of group 18 on the periodic table are called noble gases because they tend to be unreactive with most elements under most conditions.  This lack of reactivity results from the noble gases having a full valence shell, which makes participating in a reaction by gaining, losing, or sharing electrons energetically unfavorable.  Accordingly, noble gases have a very high ionization energy and a very low electron affinity.Under appropriate conditions, it is possible for species that have a very high electron affinity (eg, fluorine, oxygen) to overcome the high ionization energy of noble gas atoms and form a chemical bond.  In such cases, the reactivity of the noble gases tends to increase going down the periodic column due to the valence electrons occupying higher-energy orbitals farther from the nucleus.  As a result, xenon can form several compounds.Reactions between xenon and fluorine form relatively stable compounds but the specific compound produced depends on the ratio of these gases.  A mixture of Xe(g) and excess F2(g) produces XeF6(s) according to Reaction 1, but a mixture with a 1:2 ratio of Xe(g) to F2(g) results in the formation of XeF4(s) according to Reaction 2.Xe(g) + 3 F2(g) → XeF6(s)Reaction 1Xe(g) + 2 F2(g) → XeF4(s)Reaction 2Dissolving XeF6(s) or XeF4(s) in water forms a weakly acidic solution containing XeO3(aq), as indicated by Reactions 3 and 4.XeF6(s) + 3 H2O(l) → XeO3(aq) + 6 HF(aq)Reaction 36 XeF4(s) + 12 H2O(l) → 2 XeO3(aq) + 4 Xe(g) + 3 O2(g) + 24 HF(aq)Reaction 4XeO3 is stable in aqueous solution but as a dried solid, XeO3 is violently explosive and will detonate spontaneously upon heating or mechanical shock.  However, adding 15-crown-5 prior to isolation results in the formation of a complex (Reaction 5) that stabilizes XeO3 and makes the complex safe to isolate and dry.Reaction 5 Question 38Which of the following is the net reaction for the hydrolysis and complexation of a mixture of 6 moles XeF4 and 1 mole of XeF6 following Reactions 3, 4, and 5?  (Note:  Y = 15-crown-5.)A.XeF6 + 6 XeF4 + 15 H2O + 3 Y → 4 Xe + 3 O2 + 30 HF + 3 YXeO3B.XeF6 + 6 XeF4 + 15 H2O + Y → 6 Xe + 3 O2 + 30 HF + YXeO3C.6 XeF4 + 12 H2O + Y + XeO3 → 4 Xe + 3 O2 + YXeO3 + 24 HFD.XeF6 + 6 XeF4 + 15 H2O → 3 XeO3 + 4 Xe + 3 O2 + 30 HF

The noble gases have a particularly stable outer shell electronic configuration represented as

The elements in Group 18 are known as noble gases.In terms of their electron configurations, explain what the noble gases all have in common.

What group of the periodic table are the noble gases found in?Group 2Group 0Group 1Group 72Which of the following is not a property of the noble gases?They are colourlessThey have high boiling pointsThey exist as single atomsThey do not form molecules3Which is the best explanation for why the noble gases are unreactive?They all have low boiling pointsThey are all gasesThey all have full outer electron shellsThey are all large atoms4Which noble gas has the following electronic structure: 2, 8, 8?HeliumKryptonNeonArgon5The boiling point of helium is -269°C, while that of argon is -185.8° Predict the boiling point of neon:-275°C-246°C-269°C-176°C

1. What is the common valence electron configuration for elements in Group 18 (noble gases) of the periodic table?