Consider the following densities and atomic radii of the noble gases at 25 degre

Question

Consider the following densities and atomic radii of the noble gases at 25 degrees C.

Element                   Radius (pm)             Density (g/L)

He                                32                                .18

Ne                                70                                .90

Ar                                 98                                 ----

Kr                                112                              3.75

Xe                               130                               ------

Rn                              ------                              9.73

A, Estimate the densitites of argon and xenon by interpolation from the data.

b. Provide an estimate of the density of the yet undiscovered element with atomic number 118 by extrapolation from the data.

c. Use the molar mass of neon to estimate the mass of a neon atom. Then use the atomic radius of neon to calculate the average density of a neon atom. How does the density compare to the density of neon gas? What does this comparison suggest about the nature of neon gas?

d. Use the densities and molar masses of krypton and neon to calculate the number of atoms of each found in a volume of 1.0L, Use these vaules to estimate the number of atoms that occur in 1.0L of Ar. Now use the molar mass of Ar to estimate the density. How does the estimate compare to part A?

I cant find this anywhere in the chapter, or in her power points. Please answer and provide an explanation, i want to be able to know how to do it incase its on the test.

Thanks so much!

Explanation / Answer

argon 2
xenon 6

undiscovered 13.

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