Examlex
What evidence did Alfred Wegener use to support his continental-drift hypothesis and the formation and break-up of Pangaea? Was the evidence compelling? Why or why not?
Electron Configuration
How electrons are distributed within the atomic or molecular orbitals of an atom or molecule.
Selenium
A chemical element with symbol Se and atomic number 34, known for its role in human health and electronics.
Zinc
A metallic element with the symbol Zn and atomic number 30, known for its corrosion-resistant properties and use in various alloys and batteries.
Arsenic
A toxic metalloid element with the atomic number 33, used in various industrial processes and known for its carcinogenic properties.
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