What gas is safe to fill with a balloon?
If you want to make the balloon float, whether it is an aluminum film balloon, a latex balloon, a PVC inflatable balloon, etc., filling helium is the safest gas, because the balloon can float because the density of the gas inside is lower than The air is small, so it can float. Most people think that hydrogen-filled balloons can float, which is what we often call hydrogen balloons. Because its density is smaller than air, it can float. We learned chemistry in middle school. Learn the periodic table of chemical elements, its arrangement order is hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon, sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chlorine, argon, potassium , Calcium... Here we can see that the density of hydrogen (that is, hydrogen) is the lowest, followed by helium (helium), indicating that helium is also a very light gas, so it is filled with helium The balloons can also float.
So why is it said that helium is the safest gas? Helium is called Helium in English and its symbol is He, so many foreign businesses call helium-filled balloons Helium balloons. Helium is an inert, colorless and odorless gas. The so-called inertness means laziness and inactivity. Blowing helium against an open flame will extinguish the fire, so it is the safest gas to fill our balloons with helium.
For everyone's safety, customers are advised not to use hydrogen to inflate aluminum foil balloons. For cost reasons, the aluminum film balloons we see in the streets and parks are basically filled with hydrogen. If you use helium instead, light helium The cost of hydrogen gas needs to be 3-4 yuan, plus the cost of aluminum foil balloons, it is already about 5 yuan, and the retail price of hydrogen balloons generally seen on the street is only a few yuan, the cost of hydrogen is very low, and the general charge The cost of a balloon gas is only a few cents, so there is a profit margin.
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