Its at the BOTTOM of the lightest elements. Each element gives off energy when its created in fusion. Up to (and including) iron they give off more energy than they cost to create. This means that in a stellar explosion iron will be the last in the fusion chain. After 26 they get more and more rare because it costs more energy to make it than it gives off and they will only be created from neutron capture. This means more iron will be produced than all elements heavier than it.
No one said there was only iron in the core. It's just by far the most abundant. It's also in all the other layers of the Earth, as are all the other elements. It isn't a nice perfect little layer cake. It was (probably) made with a lot of impacts over a long period of time. Think of it more like a raisin cake with raisins all over, with a bonus raisin center.
Iron boils away to a vapor at 5,100. How would that work
Boiling point is a function of temperature and pressure, not just temperature. The higher the pressure, the higher the boiling point. The pressure is very high at the center of the Earth.
iron holds NO magnetism above 450 F or so.
It creates a dynamo effect. A dynamo is the creation of a magnetic field from a rotating induced electric field.
Its at the BOTTOM of the lightest elements. Each element gives off energy when its created in fusion. Up to (and including) iron they give off more energy than they cost to create. This means that in a stellar explosion iron will be the last in the fusion chain. After 26 they get more and more rare because it costs more energy to make it than it gives off and they will only be created from neutron capture. This means more iron will be produced than all elements heavier than it.
No one said there was only iron in the core. It's just by far the most abundant. It's also in all the other layers of the Earth, as are all the other elements. It isn't a nice perfect little layer cake. It was (probably) made with a lot of impacts over a long period of time.
Iron boils away to a vapor at 5,100. How would that work
Boiling point is a function of temperature and pressure, not just temperature. The higher the pressure, the higher the boiling point. The pressure is very high at the center of the Earth.
iron holds NO magnetism above 450 F or so.
It creates a dynamo effect. A dynamo is the creation of a magnetic field from a rotating induced electric field.
Its at the BOTTOM of the lightest elements. Each element gives off energy when its created in fusion. Up to (and including) iron they give off more energy than they cost to create. This means that in a stellar explosion iron will be the last in the fusion chain. After 26 they get more and more rare because it costs more energy to make it than it gives off and they will only be created from neutron capture. This means more iron will be produced than all elements heavier than it.
Iron boils away to a vapor at 5,100. How would that work
Boiling point is a function of temperature and pressure, not just temperature. The higher the pressure, the higher the boiling point. The pressure is very high at the center of the Earth.
iron holds NO magnetism above 450 F or so.
It creates a dynamo effect. A dynamo is the creation of a magnetic field from a rotating induced electric field.