Question

LLOU
Can you tell? Identify Dobereiner's triads from the following groups of
elements having similar chemical properties.
1. Mg (24.3), Ca (40.1), Sr (87.6) 2. S (32.1), Se (79.0), Te (127.6)
3. Be (9.0), Mg (24.3), Ca (40.1)​

Answer 1

Answer:

3 is correct one

Explanation:

add Be(9.0) and Ca(40.1) and divide it by 2 u will get answer

Answer 2

Answer:-option(A)

According to Dobereiner's traids law which states that the atomic weight of the middle element is nearly the same as average of the atomic weights of other two elements.

hope it helps you:)

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