Question

how London forces liquify helium gas

Answer 1

For the first question, it is the low boiling temperature, 4.21K for Helium-4 and 3.19K for Helium-3, that makeshelium difficult to be liquefied. Hydrogen's boiling temperature at 1 atm is 20.27K, or about 4-5 times higher.

Answer 2

For the first question, it is the low boiling temperature, 4.21K for Helium-4 and 3.19K for Helium-3, that makeshelium difficult to be liquefied. Hydrogen's boiling temperature at 1 atm is 20.27K, or about 4-5 times higher.