How did the Earth Get Here?
The Relative Abundances of the elements reflect these fusion reactions. Elements divisible by 4 are the most abundant.
To get beyond iron requires Supernova and neutron capture:
Neutron Capture: Two processes:
In the solar system (meteorites) most heavy elements are proton-rich indicating S-processed elements, but some R-processing occurred which is of very important consequence to the earth.
But R-processing produced a small bit of Uranium which is extremely important.
Overall Composition of the Earth:
Composition of the Earth's Crust: