SATHEE: The dand fblock elements

The dand fblock elements - Result Question 10

####10. $S c (Z = 21)$ is a transition element but $Z n (Z = 30)$ is not because

[NEET Kar. 2013]

(a) both $S c$ and $Z n$ do not exhibit variable oxidation states

(b) both $S c^{3 +}$ and $Z n^{2 +}$ ions are colourless and form white compounds

(d) last electron is assumed to be added to $4 s$ level in case of $Z n$

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Solution:

(c) A transition element must have incomplete $d$ -subshell. Zinc have completely filled $d$ subshell having $3 d^{10}$ configuration. Hence do not show properties of transition elements to any appreciable extent except for their ability to form complexes.

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The dand fblock elements - Result Question 10

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