Helium.

And this is just the configuration for helium.

And unfortunately, the helium atoms in liquid helium are right on top of each other.

Let me take helium out of the picture.

Hydrogen has one proton, helium, two protons,

And now you see that helium, you get 1s and then you get 2s, so helium's configuration is

And unfortunately, the helium atoms in liquid helium are right on top of each other.

A helium atom has two protons and two neutrons.

But then all of a sudden, helium is a lot more stable.

And that's why helium's called helium.

Not all of it, a lot of it has been turned into energy, but most of it is now in helium.

And then this whole haze around there, those are the two electrons that helium has, or that at least this helium atom has.

Actually, let me take helium out of the picture.

Helium splits out, and a neutron comes out and lots of energy comes out.

This is the scale of the nucleus of a helium atom, right?

It's very hard, but a little easier than helium.

And as we have more and more helium the core becomes more and more dense because helium is a more massive atom.

We need helium, and the helium is what we really need to go deep.

Anyway, this is a depiction of a helium atom.

And now simple atoms appear of hydrogen and helium.

In the middle of stars, you're joining hydrogen together to make helium and then helium together to make carbon, to make oxygen, all the things that you're made of are made in the middle of stars.

This is late in the life of a star in its giant phase.

For a moment they become helium 5, because they've got five particles inside them.

Or at least this helium atom has two protons and two neutrons.

In the case of helium, the nucleus is even a smaller fraction.

Helium has 2 protons. Carbon has 6 protons.

The first one was that when helium atoms touch each other, they repel.

In the middle of stars, you're joining hydrogen together to make helium and then helium together to make carbon, to make oxygen, all the things that you're made of are made in the middle of stars.

In the upper part of the chromosphere helium becomes partially ionized.

Helium is a chemical element with symbol He and atomic number 2.

Other workers soon used the same technique to discover indium, thallium, and helium.

And actually, for the sake of figuring out these, you should take helium and throw it right over there.

And in the last video I showed you what the helium, you could kind of say, the orbital function looks like.

In the 1950s, people were trying to figure out how superfluid helium worked.

The only way it worked is when the helium atoms were very, very far apart.

Helium has one more, so that will also go into the 1s orbital.

) For comparison, the Sun has an abundance of elements heavier than helium of about ZSol 0.0172 0.002.

This image of a helium atom, they say right here this is one femtometer.

But as soon as you do that, as soon as you go from helium, this point right here, that point right here is lithium.

After about a few minutes, there was hydrogen and helium in the universe. That's all.

So, that's that process there. Deuterium and tritium goes together makes helium 5.

Deuterium and tritium goes together makes helium 5.

Because in those tiny pockets with more atoms

It takes almost double the energy to remove that second electron from helium because it's so stable.

After about a few minutes, there was hydrogen and helium in the universe.