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Groups and periods Transitional Reasoning Practice

Chemistry · The Periodic Table · Chemistry · Organization of the Periodic Table

1 Chemistry practice questions on Groups and periods. Questions that build towards applied reasoning.

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Questions

  1. 1.

    A chemistry student analyzes three main-group elements, designated as Q, R, and T, using periodic table organization rules. Elements Q and R display highly similar chemical reactivities, but a neutral atom of R has one more occupied electron shell than a neutral atom of Q. Meanwhile, element T possesses the same number of occupied electron shells as element Q, but an atom of T has seven valence electrons and readily forms a 1- anion. Based on these observations, which deduction about the periodic placement of these elements is correct?

    • A) Elements Q and T belong to the same group because sharing the same number of occupied electron shells determines placement in a vertical column.
    • B) Elements Q and R are situated in the same period because their matching chemical behaviors require them to share a horizontal row.
    • C) Element T is located to the left of element Q in their shared period because elements forming anions always possess lower group numbers than reactive metals.
    • D) Elements Q and R belong to the same group because similar chemical properties reflect the same number of valence electrons, while R is positioned below Q in a higher-numbered period.

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