Hydrogen is extremely flammable, helium is not flammable at all.
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Helium is safe because it is non-toxic, non-flammable, and does not react with other chemicals. It is lighter than air, so it doesn't accumulate at ground level where it can pose inhalation risks. However, inhaling helium in large quantities can displace oxygen in the lungs, leading to asphyxiation.
Helium is good for balloons because it is lighter than air, which causes the balloon to float. Helium is also non-flammable, making it a safe choice for inflating balloons. Additionally, helium does not react with the materials in the balloon, allowing it to stay inflated for a longer period of time.
The symbol of Helium is He. Helium's atomic number is 2.
The symbol for hydrogen is H, and the symbol for helium is He.
AnswerThere are two variants of helium -- helium 3 and helium 4. Helium 4 is not magnetic but helium 3 is. Its magnetism is, however, of different nature than e.g. that of iron. The magnetism of helium 3 is used for medical lung imaging.
Helium is a colorless gas that is commonly used to fill balloons to make them float. It is lighter than air and non-flammable, making it safe for use in balloons.