The number of elements in Mendeleev's periodic table is ........ elements., 92, 118, 76, 67, The scientist who left vacancies in his table to be filled with suitable discovered elements in the future is ......., Moseley, Rutherford, Mendeleev, Bohr, Mendeleev classified the elements of each group into .......... sub-groups, 2, 3, 4, 5, The chemical elements have been categorized in a table to ease its study., true, false, The modern periodic table is the first real table for classifying elements., true, false, The elements with similar properties have been put in horizontal periods., true, false

Grade 8

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