Helium (version 1) - Periodic Table of Videos
Newer Helium video: https://youtu.be/M6xZZiaLOV4 Donald Duck voices and floating balloons. Helium is element number 2 on the periodic table. More links in ...
==========
This is a balloon of Helium, and Helium is a very small gas. we use in this case to find leaks in high pressure in high vacuum operators, because it's very very small, finds the smallest, smallest holes. But just like Hydrogen, it's also very very light. And you know, in the past we used Hydrogen to fill balloons, for transport, and now you see the Goodyear Blimp, sporting occasions, filled with Helium. So Helium is probably the most unreactive of the elements. It has a mass of 4, so it weighs four times as much as a Hydrogen atom, but Hydrogen is an H2 molecule, whereas Helium exists as isolated atoms, so that the a Helium molecule weighs twice as much as Hydrogen. See here, we have a Helium filled balloon, and it's extremely light, so I'm not gonna let it go right now s...
==========
This is a balloon of Helium, and Helium is a very small gas. we use in this case to find leaks in high pressure in high vacuum operators, because it's very very small, finds the smallest, smallest holes. But just like Hydrogen, it's also very very light. And you know, in the past we used Hydrogen to fill balloons, for transport, and now you see the Goodyear Blimp, sporting occasions, filled with Helium. So Helium is probably the most unreactive of the elements. It has a mass of 4, so it weighs four times as much as a Hydrogen atom, but Hydrogen is an H2 molecule, whereas Helium exists as isolated atoms, so that the a Helium molecule weighs twice as much as Hydrogen. See here, we have a Helium filled balloon, and it's extremely light, so I'm not gonna let it go right now s...
