Identify the incorrect statements.
A. Both (I) and (III)
B. Both (II) and (III)
C. Both (I) and (IV)
D. Both (II) and (IV)
Answer:A
Identify the incorrect statements.
A. Both (I) and (III) B. Both (II) and (III) C. Both (I) and (IV) D. Both (II) and (IV)
Explanation: Dobereiner’s triods consisted of three elements having simiLar properties. He coutd identifij onLy three triads out of the elements discovered at that time. They were (Li, Na, K), (Ca. Sr. Ba) and (Cl, Br, I). The atomic mass of the middle element was roughly equal to the average of the atomic masses of the other two elements.