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Modern periodic table is based on atomic no. experiments which proved importance of at no. was -
A
Braggs work on X-ray diffraction
B
Moseleys work on X-ray spectrum
C
Mulliken’s oil drop experiment
D
Lother meyer curve plotted between at vol. & at. wt.
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Elements which occupied position in the lother meyer curve, on the peaks, were -

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The elements of groups, 1, 2, 13, 14, 15, 16 and 17 are collectively called -

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