According to Newlands' octave law, the periodicity in elements is found when:
Elements are found in increasing order of their atomic masses.
Elements are found in increasing order of their atomic number.
Elements are found in decreasing order of their atomic masses.
Elements are found in decreasing order of their atomic number.
Periodicity is the repetition of similar physical and chemical properties after a fixed interval.
The periodicity in elements is observed when they are arranged in increasing order of their atomic masses.
Therefore, Option(1) is correct
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