How did the balloon float?

Filling balloons with hydrogen (Hz) or helium (he) can make them float.

1. Hydrogen filling: The mass of hydrogen is lighter than that of air. Filling the balloon with hydrogen can really make the balloon float. However, hydrogen will explode when exposed to an open flame. To sum up, hydrogen is not recommended.

2. Helium: Compared with flammable and explosive hydrogen, helium is obviously much more honest. Helium is a colorless, tasteless and odorless inert gas, which is gaseous at room temperature. The so-called inert gas means that helium does not react chemically with other elements and compounds under normal circumstances. You can't ignite with an open flame. Unlike hydrogen, hydrogen is easy to explode. However, it is safe and can fly, which does not mean that helium has no shortcomings.

Balloon style

1, Heart-shaped balloon: Heart-shaped balloons are the easiest to use at weddings. It wins with the shape of love and can express love. It is mostly used to decorate or decorate the wedding background wall, and it is also used more when taking pictures.

2, letter balloon: letter balloon is actually a kind of aluminum balloon, it is different from the general balloon shape, is presented in letters, generally used to decorate the background wall, or multi-person interaction to take pictures together.

3. Cartoon balloons: In parks and squares, you can often see mobile vendors selling cartoon balloons, "Pleasant Goat" and "Spongebob", which are colorful and extremely cute. Few children can resist this temptation.