Which of the following compounds is most acidic? 
Definitions:
Early Earth
The period in Earth's history just after its formation, characterized by extreme conditions and the gradual development of the planet's atmosphere and oceans.
Modern Earth
Modern Earth refers to the current geological and biological age of Earth, encompassing the present-day conditions and the life forms that inhabit it.
Isotope
Variants of a particular chemical element which differ in neutron number, and consequently in nucleon number, but not in proton number.
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