Yes, because helium doesn't react, burn or explode.
Heavier but safer. Look what happened to the Hindenburg:(
Because hydrogen is reactive and combines with oxygen, while helium is inert.
Yes, party balloons that float are filled with helium. Helium is used because it is lighter than air, causing the balloon to float upwards, but safer than the alternative hydrogen, which is explosive.
Hydrogen is lighter than Helium.
Hydrogen is lighter than helium. So hydrogen balloon will float better than helium.
Hydrogen is dangerous than Helium because Hydrogen is a stronger gas than Helium.
Liquid Helium is colder than Liquid Hydrogen.
Helium has more mass than hydrogen.
No, helium is almost 4 times as heavy as hydrogen.
because the mass of hydrogen is less than that of helium
Because hydrogen is lighter that helium
Helium had valence electron of 2 and filled the most inner ring so it is chemically robust and inert. Outer valence electron ring contain 8 electrons so for Neon is robust as it had 2,8 electrons and Argon had 2,8,8 electrons and fill the outer ring.