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Name: Gina
Status: student
Age: 16
Location: N/A
Country: N/A
Date: 1999
Question:
Could you please explain for me why a balloon filled with H2 or He has very little gas in it after 24 hours?

Replies:
He and H2 molecules are small and easily escape through the thin wall of the balloon or its outlet.

Dr. Ali Khounsary
Advanced Photon Source
Argonne National Laboratory
Argonne, IL 60439

Helium atoms are small, balloon material has small holes in it.

Tim Mooney


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