A student has a sample of an unknown metal solid, labelled 'metal x. The sample is shiny in appearance and gray in color. Describe possible experiment that can place metal x in the reactivity series. Describe the reactions that would take place and expected results if metal x is more reactive than iron. Suggest an identity

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d-Block Elements

According to the modern form of periodic table, 118 elements are present which are subdivided as four blocks, namely, s, p, d and f-block elements based on the entry of the valence electron or last electron into which orbital.