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Chemistry · Classification of Elements and Periodicity in Properties
हिन्दीConsider the following statements regarding Mendeleev's periodic table: (A) Mendeleev ignored the order of atomic weights in certain instances to group elements with similar properties together. (B) Iodine with a lower atomic weight than tellurium was placed in Group VII along with fluorine, chlorine, and bromine. (C) Mendeleev left gaps for undiscovered elements like eka-aluminium and eka-silicon. (D) Mendeleev's periodic table was published in 1905. How many of the above statements are correct?
Correct answer · Option 3
Only three
Explanation
Statements (A), (B), and (C) are correct. Statement (D) is incorrect because Mendeleev's periodic table published in 1905 is referenced later for a different milestone, whereas his main work was published earlier (1869 onwards).
