Metallic hydrogen

Hey there little one, have you ever heard about something called metallic hydrogen? It's a really cool and very rare substance that scientists have been trying to make for a very long time.

You know that water can be a solid, a liquid or a gas, right? Like ice, water and steam? Well, hydrogen can also be in different forms. Normally, hydrogen is a gas, but if you cool it down to a temperature close to absolute zero (which is almost the coldest temperature possible), it becomes a solid.

But if you increase the pressure a lot, something really interesting and unexpected happens. The hydrogen atoms start to come closer and closer together until they are so close that they start to share electrons. This is called bonding, and when enough hydrogen atoms bond together, they form a solid metallic hydrogen.

This form of hydrogen is really special, because it conducts electricity perfectly and never loses any energy. This means that it could be used to make super-fast and super-efficient computers, among other things.

The problem is that making metallic hydrogen is really hard. Scientists have been trying to do it for almost a century, but nobody has managed to make enough to be able to study it properly. Some people even think that it might be impossible to do, but others believe that we might be able to do it someday.

So, metallic hydrogen is a really fascinating substance that has the potential to revolutionize the way we use electricity, but for now it remains a mystery that we are still trying to solve.