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a chemical reaction in which heat, pressure or a catalyst is used, singly or in combination, to rearrange the atoms in molecules to form new molecules.
a group of organic compounds where an oxygen atom has replaced two hydrogen atoms on an end...
a process whereby molecules combine automatically to form new ions as in the case of water.
a group of metallic elements that have two electrons in their outer shells and react easily with...
ratio of atoms is 1 : 4 with a bond angle of 109,50 example CH4