The table shows the atomic number and boiling points of some noble gases.

a. Use ideas about forces between atoms to explain this trend in boiling points.

b. Xenon forms a number of covalently bonded compounds with fluorine.
i. What do you understand by the term covalent bond?
ii. Draw a dot-and-cross diagram for xenon tetrafluoride, XeF₄.
iii. Suggest a shape for XeF₄. Explain why you chose this shape.

c. The structure of xenon trioxide is shown below.

i. By referring to electron pairs, explain why xenon trioxide has this shape.
ii. Draw the structure of xenon trioxide to show the partial charges on the atoms and the direction of the dipole in the molecule.

Transcribed Image Text:

Gas helium krypton neon argon хenon Atomic number 2 10 18 36 54 Boiling point/°C -253 -246 -186 -152 -107