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1. D. I. Mendeleyev made ... a thorough study ... the relation ... the

atomic weights... the elements and their properties. 2. Mendeleyev’s periodic

table consisted ... seventeen columns. 3 . a general way Mendeleyev’s

table resembled ... the present periodic table ... the noble gases.

4. Mendeleyev placcd... a number... elements... different positions. 5. The

periodic law was accepted ... its proposal... Mendeleyev. 6. M ost... the

elements occur ... the periodic table ... the order ... increasing atomic

weights. 7. Mendeleyev predicted the existence ... six elements

corresponding... vacant places... his table. 8. The properties... the newly

discovered elements were very close ... the properties predicted ... him

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by, of, to, in, after, without, between1. D. I. Mendeleyev made ... a thorough study ... the relatio...

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