Question

Select all the true statements.

None of the period 4 transition metals, except Cu, are active enough to reduce H⁺ from aqueous acid to form hydrogen gas.

Lanthanide contraction is responsible for the shrinkage in atomic size between a group in period 5 to period 6.

Period 6 contains some of the densest elements known.

Many transition metal compounds are colorless and diamagnetic.

  

Answer 1

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