d and f BLOCK ELEMENTS MCQ Quiz: GKFix - Bridge of Knowledge

Question 2141

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Based on Table 3.3, which property prediction for Eka-aluminium (Gallium) was least accurate?

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Which element's discovery first provided strong evidence for Mendeleev's predictions?

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What was a key factor that allowed Mendeleev to make successful predictions about undiscovered elements?

He used advanced technology.
He guessed randomly.
He focused on alphabetical order.
His focus on grouping elements with similar properties according to his Periodic Law.

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How did Mendeleev's 1905 periodic table differ from his original 1869 version?

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What does the discovery of gallium and germanium validate about Mendeleev's work?

That his atomic weight measurements were perfect.
That he discovered all elements.
That his table was purely theoretical.
The predictive power and fundamental correctness of his Periodic Law and table structure.