2 ms·
Hydrogen molecules (2 atoms) are much larger than the single-atom helium molecules. This is why helium gas is uniquely difficult to seal.
by drcoopster 8y ago
Hydrogen molecules (2 atoms) are much larger than the single-atom helium molecules. This is why helium gas is uniquely difficult to seal.
- quickthrower2 8y agoYep that's why you need to get your kids party balloons on the same day as the party.