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a material that has intermediate electrical conductivity that can be changed and controlled. It does not conduct heat and electricity as well as metals do.
a molecule that is so big that we can see it, e.g. a diamond, a salt crystal and a piece of...
the industry in which chlorine is prepared for commercial use and at the same time alkalis are...
a chemical reaction in which a substance reacts to form two or more simpler substances.
an atom of an element that loses or gains an electron and becomes electrically charged.