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Why are Zn, Cd and Hg normally not regar...

Why are Zn, Cd and Hg normally not regarded as transition elements ?

Text Solution

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This is because neither the elements nor their ions have incomplete d-orbitals.
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(a) Why are Zn, Cd and Hg not regarded as transition metals? (b) Why do transition metals form complexes ? (c ) Why are Zn^(2+) salts white in colour?

Why is zinc not regarded as a transition element ?

Knowledge Check

  • Assertion : Zn, Cd and Hg are not regarded as transition elements. Reason : The electronic configurations of Zn, Cd and Hg are represented by the general formula (n-1)d^10ns^2 .

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true and reason not is the correct explanation of assertion.
    C
    If assertion is trun but reason is false.
    D
    If both assertion and reason are false.

    • Similar Questions

    Explore conceptually related problems

    Zn, Cd and Hg are not regarded as transition metals. Give reason.

    Read the given passage and answer the questions number 1 to 5 that follow : The d-block of the periodic table contains the elements of the groups 3 - 12 and are known as transition elements. In general, the electronic configuration of these elements is (n - 1) d^(1-10)ns^(1-2) . The d-orbitals of the penultimate energy level in their atoms receive electrons giving rise to the three rows of the transition metals i.e., 3d, 4d and 5d series. However, Zn Cd and Hg are not regarded as transition elements. Transition elements exhibit certain characteristic properties like variable oxidation states, complex formation, formation of coloured ions and alloys, catalytic activity, etc. Transition metals are hard (except Zn, Cd and Hg) and have a high melting point. Why are Zn, Cd and Hg non-transition elements ?

    Read the given passage and answer the questions number 1 to 5 that follow : The d-block of the periodic table contains the elements of the groups 3 - 12 and are known as transition elements. In general, the electronic configuration of these elements is (n - 1) d^(1-10)ns^(1-2) . The d-orbitals of the penultimate energy level in their atoms receive electrons giving rise to the three rows of the transition metals i.e., 3d, 4d and 5d series. However, Zn Cd and Hg are not regarded as transition elements. Transition elements exhibit certain characteristic properties like variable oxidation states, complex formation, formation of coloured ions and alloys, catalytic activity, etc. Transition metals are hard (except Zn, Cd and Hg) and have a high melting point. Why is Cu^(2+) ion coloured while Zn^(2+) ion is colourless in aqueous solution ?

    Read the given passage and answer the questions number 1 to 5 that follow : The d-block of the periodic table contains the elements of the groups 3 - 12 and are known as transition elements. In general, the electronic configuration of these elements is (n - 1) d^(1-10)ns^(1-2) . The d-orbitals of the penultimate energy level in their atoms receive electrons giving rise to the three rows of the transition metals i.e., 3d, 4d and 5d series. However, Zn Cd and Hg are not regarded as transition elements. Transition elements exhibit certain characteristic properties like variable oxidation states, complex formation, formation of coloured ions and alloys, catalytic activity, etc. Transition metals are hard (except Zn, Cd and Hg) and have a high melting point. Why are melting points of transition metals high ?

    Read the given passage and answer the questions number 1 to 5 that follow : The d-block of the periodic table contains the elements of the groups 3 - 12 and are known as transition elements. In general, the electronic configuration of these elements is (n - 1) d^(1-10)ns^(1-2) . The d-orbitals of the penultimate energy level in their atoms receive electrons giving rise to the three rows of the transition metals i.e., 3d, 4d and 5d series. However, Zn Cd and Hg are not regarded as transition elements. Transition elements exhibit certain characteristic properties like variable oxidation states, complex formation, formation of coloured ions and alloys, catalytic activity, etc. Transition metals are hard (except Zn, Cd and Hg) and have a high melting point. Why do transition metals and their compounds show catalytic activity ?

    Read the given passage and answer the questions number 1 to 5 that follow : The d-block of the periodic table contains the elements of the groups 3 - 12 and are known as transition elements. In general, the electronic configuration of these elements is (n - 1) d^(1-10)ns^(1-2) . The d-orbitals of the penultimate energy level in their atoms receive electrons giving rise to the three rows of the transition metals i.e., 3d, 4d and 5d series. However, Zn Cd and Hg are not regarded as transition elements. Transition elements exhibit certain characteristic properties like variable oxidation states, complex formation, formation of coloured ions and alloys, catalytic activity, etc. Transition metals are hard (except Zn, Cd and Hg) and have a high melting point. Which transition metal of 3d series does not show variable oxidation states ?

    Why Zn, Cd and Hg are not considered as typical transitions elements ?

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