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  • Give answer! Sc (Z=21) is a transition element but Zn (Z=30) is not because

Sc (Z=21) is a transition element but Zn (Z=30) is not because

  • Option 1)

    both Sc and Zn do not exhibit variable oxidation states

  • Option 2)

    both Sc^{3+} and Zn^{2+} ions are colourless and form white compounds

  • Option 3)

    in case of Sc, 3d orbitals are partially filled but in Zn these are completely filled

  • Option 4)

    last electron is assumed to be added to 4s level in case of Zn

 

Answers (1)

 

Transition Elements -

The elements in which second last shell is incompletely filled called Transition elements.

- wherein

22^{Ti}\Rightarrow 3d^2,4s^2

 

 Transition element are those in which second last shell is in completely filled.

In S_{c}, the e^{-} config is 3d^{1}4s^{2}

wheareas in Z_{n}  config is 3d^{10}4s^{2}

\therefore  In Z_{n}, the 3d leaving completely filled, its not a transtion element.


Option 1)

both Sc and Zn do not exhibit variable oxidation states

Incorrect Option

Option 2)

both Sc^{3+} and Zn^{2+} ions are colourless and form white compounds

Incorrect Option

Option 3)

in case of Sc, 3d orbitals are partially filled but in Zn these are completely filled

Correct Option

Option 4)

last electron is assumed to be added to 4s level in case of Zn

Incorrect Option

Posted by

subam

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