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| 1. |
What are the merit and d-merit of the mendeleev periodic table |
| Answer» Merits-It predicted the existance of some undiscovered elementsHe also explained the properties of some unknown elementsHe was the first scientist to arrange elements in a sytematic mannerDemerits-Position of hydrogen could not be explainedPosition of isotopesHe placed cobalt before nickel though cobalt has more atomic mass | |