Endothermic and Exothermic Reactions All reactions can be classified as endothermic storing energy or exothermic releasing energy. Electronegativity is measured using the Pauling scale, which was instated by Linus Pauling.
Polyatomic Ions Polyatomic ions are ions with many atoms; they contain more than one element. And this is not the end of the story yet. Your help is just a couple of mouse clicks away. All this information will be immediately visible to the writer, who uses an extensive database of libraries, from which the needed information is obtained.
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