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Triads are groups ofclosely related elem...

Triads are groups of______closely related elements.

A

thirteen

B

thirty

C

three

D

thirty nine

Text Solution

Verified by Experts

The correct Answer is:
C
D`ddot(o)`bereiner observed a few groups of three chemically similar elements and called them triads.
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R SHARMA-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN ELEMENTS-Follow-up Test 1
  1. Triads are groups ofclosely related elements.

    Text Solution

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