Examlex
What are three concepts that are of great importance to the study of African history,and why?
Transition Metals
Elements found in the central block of the periodic table, characterized by their ability to form variable oxidation states and to create colored compounds.
Covalent Bond
A type of chemical bond where two atoms share one or more pairs of valence electrons, creating a stable balance of attractive and repulsive forces between atoms.
Carbon Tetrabromide
A chemical compound with the formula CBr4, known for its high density and usage in organic synthesis as a solvent or reagent.
Sulfur Trioxide
A chemical compound with the formula SO3, which is a key intermediate in the sulfuric acid manufacturing process, known for its role in acid rain formation when released into the atmosphere.
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