Examlex
Which of the following correctly characterizes the trade relationship between Portugal and the states of West Africa?
Protons
Subatomic particles with a positive charge located within an atom's nucleus.
Reactive
Pertains to substances or materials that readily undergo chemical reactions, typically involving a significant response to other chemicals or stimuli.
Atomic Number
Number of protons in the atomic nucleus; determines the element.
Hydrogen
The lightest and most abundant chemical element in the universe, consisting of a single proton and electron, and playing a vital role in chemistry and the energy industry.
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