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You may want to reference (Pages 263 - 267) Section 7.3 while completing this problem.
With the exception of helium, the noble gases condense to form solids when they are cooled sufficiently. At temperatures below 83 K, argon forms a close-packed solid whose structure is shown below.
What is the apparent radius of an argon atom in solid argon, assuming the atoms touch as shown in this figure? Is this value larger or smaller than the bonding atomic radius estimated for argon in the figure shown below?
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