Question

Form the following groups of elements which group does not belong to Dobereiners Triad options 1)Cu, Ag, Au 2) Li, Na, k 3) Ca, Sr, Ba, 4) Be, Mg, Ca​

Answer 1

Answer

Since the atomic weight of Ag is not equal to the mean of the atomic weights of Cu and Au.

Thus, (Cu, Ag, Au) triad do not follow Dobereiner's law of triads.

Option 1 is correct.