Question

(vi) State Dobereiner's law of triads. Identify Dobereiner's triads from following groups of-elements having similar chemical properties (a) Mg (24.3), Ca (40.1), Sr (87.6) (b) S (32.1), Se (79.0), Te (127.6) (c) Be (9.0), Mg (24.3). Ca (40.1)​

Answer 1

Answer:

Answer should be (c) because it is the closest

(Be+Ca)/2 ≈ Mg

(9 + 40.1)/2 ≈ 24.3

49.1 / 2 ≈ 24.3

24.55 ≈ 24.3

This is the closest

so (c) is the answer