Question

rearrange the columns 2 and 3 so as to match with the columns 1
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Answer 1

Answer:

Column 1 —— Column 2 answer —— Column 3 answer

(i) Triad —— c) average of 1st and 3rd atomic mass —— 5) Dobereiner

(ii) Octave —— d) properties of 8th element similiar to 1st —— 3) Newlands

(iii) Atomic No. —— e) +ive charge on nucleus. —— 6) Moseley

(iv) Period —— f) Sequential change in molecular formulae —— 1) Mendeleev

(v) Nucleus —— b) concentrated mass and +vely charged —— 4) Rutherford

(vi) Electron —— a) lightest and -vely charged particle in all atoms —— 2) Thomson

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