Question 1

Which noble gas is known to form stable compounds with fluorine under standard conditions?

Accepted Answer

Xenon

Question 2

Given the reaction $\mathrm{Xe} (g) + n\ \mathrm{F}_2 (g) \rightarrow \mathrm{XeF}_n (s)$, what is the value of $n$ for the most stable xenon fluoride formed at room temperature?

Accepted Answer

$n = 6$

Question 3

Which of the following xenon compounds is a colorless crystalline solid at room temperature?

Accepted Answer

$\mathrm{XeF}_6$

Question 4

Why are noble gases generally unreactive, and what allows xenon to form compounds with fluorine?

Accepted Answer

Noble gases have full valence shells, but xenon can be oxidized by highly electronegative elements like fluorine.

Question 5

Which of the following xenon compounds is too unstable to exist under normal conditions?

Accepted Answer

$\mathrm{XeF}_7$

Question 6

A scientist attempts to synthesize $\mathrm{XeF}_7$ in the laboratory. What is the most likely outcome?

Accepted Answer

$\mathrm{XeF}_7$ will decompose immediately into $\mathrm{XeF}_6$ and $\mathrm{F}_2$.

Question 7

Which property of fluorine makes it capable of reacting with xenon to form stable compounds?

Accepted Answer

High electronegativity

Question 8

If $\mathrm{XeF}_6$ is dissolved in water, which of the following is a possible product?

Accepted Answer

$\mathrm{XeO}_3$

Question 9

Which of the following statements best explains why helium does not form stable compounds under normal conditions?

Accepted Answer

Helium has a very small atomic radius and high ionization energy.

Question 10

A chemist wants to prepare a noble gas compound for use in a medical imaging device. Which compound is most likely to be used?

Accepted Answer

$\mathrm{XeF}_6$

Question 11

Which equation correctly represents the synthesis of xenon hexafluoride from xenon and fluorine gas?

Accepted Answer

$\mathrm{Xe} (g) + 3\ \mathrm{F}_2 (g) \rightarrow \mathrm{XeF}_6 (s)$

Question 12

Which of the following is NOT a property of noble gas compounds?

Accepted Answer

They are commonly found in nature.

Question 13

Which of the following best describes the trend in reactivity among noble gases?

Accepted Answer

Reactivity increases with increasing atomic number.

Question 14

A sample of $\mathrm{XeF}_6$ is exposed to air and moisture. What is the most likely chemical hazard?

Accepted Answer

Formation of toxic $\mathrm{XeO}_3$

Question 15

Which of the following is a correct statement about the formation of noble gas compounds?

Accepted Answer

Noble gases can form compounds with highly electronegative elements under specific conditions.

Noble Gas Compounds: Xenon Fluorides

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