London Dispersion Forces Worksheet

Question 1

Which change in one atom can induce a dipole in a nearby neutral atom?

1. A change in its number of protons
2. A temporary uneven distribution of its electrons
3. A loss of neutrons from its nucleus
4. A permanent increase in its nuclear charge

Question 2

Which pair can experience London dispersion forces?

1. Two neon atoms only
2. Two nitrogen molecules only
3. Both two neon atoms and two nitrogen molecules
4. Neither two neon atoms nor two nitrogen molecules

Question 3

A xenon atom has a larger, more easily distorted electron cloud than a neon atom. Explain how this affects the relative strength of attractions in pure xenon and pure neon.

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Question 4

Nitrogen boils when its molecules move apart. Explain whether the N≡N bonds within the molecules must break.

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Question 5

Which sample has the highest normal boiling point?

1. Ne
2. Ar
3. Kr
4. All three have the same boiling point.

Question 6

Use a pair of rows to support the claim that stronger attractions are associated with a higher boiling point in this series.

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Question 7

How many degrees Celsius higher is the normal boiling point of argon than that of neon? Show your calculation.

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Question 8

Xenon has more electrons per atom than krypton and a more easily distorted cloud. Based on the trend, which is the best prediction for xenon’s normal boiling point?

1. Below −246 °C
2. Between −246 °C and −186 °C
3. Between −186 °C and −153 °C
4. Above −153 °C