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composed of two or more parts/elements/ingredients
at regular intervals of time
smallest physical unit of an element or compound
a component of a whole; one of a class of substances that can't be separated into smaller substances chemically.
to recognize or establish the identity of someone or something.
composed of dissimilar elements
smallest component of an element that has the chemical properties of the element
any combination of different elements
number of positive charges or protons in the nucleus of an atom of a given element
composed of elements having the same composition throughout