Comment by drcoopster
7 years ago
Hydrogen molecules (2 atoms) are much larger than the single-atom helium molecules. This is why helium gas is uniquely difficult to seal.
7 years ago
Hydrogen molecules (2 atoms) are much larger than the single-atom helium molecules. This is why helium gas is uniquely difficult to seal.
Yep that's why you need to get your kids party balloons on the same day as the party.