write mendeleev periodic law of classification of elements in short words
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He observed that when the elementswere arranged in increasing order of their atomic masses, there was aperiodic recurrence in their physical and chemical properties. Thus, Mendeléev formulated a Periodic Law, which states that 'the properties ofelements are the periodic function of their atomic masses'.
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Mendeleev arranged the 63 elements known at his time in the increasing order of their atomic masses and found that the element with similar and chemical properties occur at regular interval.
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