Column I
|
Column 2
|
Column 3
|
i. Triad
|
a. Lightest and negatively charged particle in all the atoms.
|
1. Mendeleev
|
ii. Octave
|
b. Concentrated mass and positive charge.
|
2. Thomson
|
iii. Atomic Number
|
c. Average of the first and the third atomic mass
|
3. Newlands.
|
iv. Period
|
d. Properties of the eight element similar to the first.
|
4. Rutherford.
|
v. Nucleus
|
e. Positive charge on the nucleus.
|
5. Dobereiner
|
vi. Electron
|
f. Sequential change in molecular formulae
|
6. Moseley
|
Ans. (i – c – 5 ) , (ii – d – 3) , (iii – e – 6 ) , (iv – f – 1) , (v – b – 4), (vi - a – 2).
