someone explain this easily. please
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Q. WHAT ARE TRIADS
A GROUP OF 3 ELEMENTS HAVING SIMILAR PROPERTY,WHEN ARRANGED IN THE ORDER OF INCREASING ATOMIC MASS MIDDLE ELEMENT IS ROUGHLY AVERAGE OF FIRST AND THIRD TERM
A GROUP OF 3 ELEMENTS HAVING SIMILAR PROPERTY,WHEN ARRANGED IN THE ORDER OF INCREASING ATOMIC MASS MIDDLE ELEMENT IS ROUGHLY AVERAGE OF FIRST AND THIRD TERM
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