because it is a basic gas and cannot be reproduced.therefore we have a limited amount.
Yes, helium is considered to be expensive. It is a finite resource and its production and supply are limited. The cost of helium has been increasing in recent years due to the growing demand and limited availability, which makes it relatively expensive compared to other gases.
helium balloons
You can use air but it won't float so I would recommend helium. If you suck in helium, it will make your voice sound weird.... Try it!!
helium is used for excitation of neon atoms in helium neon laser..
Inhale
Helium is used for inflating balloons and dirigible airships.
it can be used to fill helium balloons
the use for balloons mostly
Liquid helium is used to cool the superconducting electromagnets.
Helium
its the 2nd element on the periodic table and it makes things lighter, such as helium balloons, which float as helium is lighter than air
helium is used to cool superconducting magnets in mri scanners as helium is lighter then air airships use them as gasses