Which of the following groups of three elements each constitutes Dobereiner's triads?
ACa, Ba, F
BLi, Mg, Al
CCl, H, Si
DCl, Br, I
Answer:
D. Cl, Br, I
Read Explanation:
The correct Dobereiner's triad is Cl, Br, I.
Johann Wolfgang Dobereiner, a German scientist, discovered Dobereiner's triads, which are collections of elements with related properties.
He noticed that triads-groups of three elements-could develop in which all the components had comparable physical and chemical characteristics.
According to Dobereiner's law of triads, the atomic masses of the first and third elements in a triad will approximately equal the atomic masses of the second element in that triad.
