Teaching Railway Teacher PRT 2025 Mock Test Series General Science Chemistry Classification of Elements and Periodicity in Properties
Which of the following statement is 'true' for ‘dobereiner's triads'?
I. Triads were in order of atomic masses.
II. Atomic mass of middle element was roughly the average of atomic masses of other two elements.
1
Only I
2
Both I and II
3
Neither I nor II
4
Only II