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a number that indicates how the atom will react during the formation of chemical bonds.
an ion that does not take part in the reaction but is present in the reaction mixture throughout...
6,02 x 1023 particles or objects. Also known as the number of particles in one mole...
electrons that have been emitted from the nucleus of an atom of a radioactive element.
a table of the elements in which elements with similar chemical and physical properties are...