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Hydrogen, until the Hindenburg,then everyone realized that "Hey, Hydrogen isn't that safe to use!"

Hot air balloons, you mean?? Just air that is hot.

Actual hand balloons and such? Helium or again, just air. Helium floats better because it is lighter than the surrounding air around it. Helium and air are still used in both.

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15y ago

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Hydrogen was used in air balloons at older times. but at present we use helium gas in air balloons . helium is an inert gas.

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14y ago
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There are two gases that are lighter than air, most commonly Helium is used in balloons because the other gas, Hydrogen is explosive.

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14y ago
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Examples: helium, hot air.

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11y ago
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Hydrogen.

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Wiki User

15y ago
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hileum

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Wiki User

14y ago
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