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    Just want to check whether the definitions I learnt are right.

    d-block elements are those having outer electrons in d orbitals which are in the process of being filled.
    Transition elements are d-block elements forming one or more stable ions which have incompletely filled d-orbitals.
    Are they correct?

    So, Zinc is neither a d-block nor transition element?
    Are all transition elements d-block elements?
    Can anyone suggest some examples of d-block elements which are not transition element? Is Scandium a transition element?
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    (Original post by keisiuho)
    Just want to check whether the definitions I learnt are right.

    d-block elements are those having outer electrons in d orbitals which are in the process of being filled.
    Transition elements are d-block elements forming one or more stable ions which have incompletely filled d-orbitals.
    Are they correct?

    So, Zinc is neither a d-block nor transition element?
    Are all transition elements d-block elements?
    Can anyone suggest some examples of d-block elements which are not transition element? Is Scandium a transition element?

    Zinc is a d-block element, in the last d-block column, but not a transition metal. Scandium is not a transition element, no. Silver is also a bit anomalous, but I'm still not sure why exactly it only forms one ion...
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    d-block element = an element which has at least one bonding electron in its d shell.
    e.g scandium and zinc

    Transition elemnet = an elment which forms one or more ions with a partially filled d subshell and are stable under normal conditions.
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    (Original post by ianaf18)
    d-block element = an element which has at least one bonding electron in its d shell.
    e.g scandium and zinc
    Why does Zinc have bonding electrons in its d shell? It is fully filled.
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    so is Zinc^(2+) a transition element then? or Sc^(3+)? or are these ions and not elements that they wont be classed as transitional elements?

    (Original post by ResidentEvil)
    so is Zinc^(2+) a transition element then? or Sc^(3+)? or are these ions and not elements that they wont be classed as transitional elements?
    no - even these ions still have full d-shells. eg the electronic structure of Zn (outermost shells) is 3d10 4s2

    so when it becomes Zn 2+ it still has a full dshell as it only loses the outer s electrons.

    I don't think Sc actually forms Sc 3+ although I may be wrong.

    regarding the 2nd part of your question, a transition element is one that has an incomplete d shell in one of its oxidation states (i think?) so even if the element has a fll d shell, if it forms an ion with an incomplete d
    shell it still counts as transition.

    But this is why for e.g. Cu(I) compounds are usually colourless but Cu(2) compounds usually coloured (coloured compounds being a common feature of transition metals) - only the Cu(2) has an incomplete d shell

    rosei
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    A d block element is an element where the highest occupied energy level is a d orbital.

    A transition element is an element that forms at least one stable ion with a partially filled d shell.
 
 
 
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