Question

126.9
2.1 Dobereiner's Triads
Identify Dobereiner's triads from the following groups of
Can you tell?
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:

option b is correct it following d