The fundamental question of the Earth science is: How, exactly, was our planet formed?
Since nobody was present there back then, a number of models is being discussed. The currently accepted one is based on the Solar Wind having had “blown” the chemical elements away from the Proto-Sun soon after it was formed.
Vladimir Larin started developing the Primordially Hydridic Earth (PHE) concept in 1960s. Indeed, this work required the fundamental and systematic approach. Eventually, he came up with a simple yet overwhelmingly fundamental suggestion that chemical elements were originally distributed across the Solar System by means of magnetic separation, based on their 1st ionization potentials, or 1IP. According to this model, the magnetic field formed by the Proto-Sun plasma cloud worked as a huge screening device:
Magnetic separation of charged particles during the formation of the protoplanetary disk. From V. N. Larin. Our Earth, 2005*
*Was recently confirmed by Nagayoshi Ohashi et al, Early Planet Formation in Embedded Disks (eDisk). I. Overview of the Program and First Results, The Astrophysical Journal (2023). DOI: 10.3847/1538-4357/acd384. See https://phys.org/news/2023-06-alma-deeper-mystery-planet-formation.html
Needless to say that with years, a lot of newly acquired data have been repeatedly confirming the PHE concept, e.g.:
“The Earth’s core is considered the dominant reservoir of hydrogen. An enhanced flux of hydridic fluids mobilizes the mantle and sustains tectonism and metallogenesis over 100s of millions of years.” John L. Walshe et al. (2005). Mineral systems, hydridic fluids, the Earth’s core, mass extinction events and related phenomena. Chapter 1-17, 2005. https://link.springer.com/chapter/10.1007/3-540-27946-6_17
“More than 75 vol. % of the Earth’s present-day mantle is likely to be saturated with metallic iron.” A. Rohrbach et al., 2011. Experimental Evidence for a Reduced Metal-saturated Upper Mantle. JOURNAL OF PETROLOGY, VOL. 52, No. 4. pp. 717-731.
“There may be up to 70 times more Hydrogen in Earth’s core than in the oceans”. https://www.sciencedaily.com/releases/2021/05/210514134102.htm S. Tagawa et al., 2021. Experimental evidence for hydrogen incorporation into Earth’s core. NATURE COMMUNICATIONS, 2021 https://doi.org/10.1038/s41467-021-22035-0