Question

Which of the following statements regarding transition elements is NOT true ?

• A. Zinc has completely filled \((n-1)\) d orbital in ground state.
• B. Zn is not regarded as transition elements.
• C. On the same ground like Zn, Cu is also not considered as transition element.
• D. General electronic configuration of \(4d\) series is [Kr] \(4d^{1-10}5s^{0-2}\)

Hint:

Copper has an incompletely filled d subshell in its common +2 state, so it is a transition element unlike zinc.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept
A transition element has an incomplete d subshell in its ground state or in any of its common oxidation states.

Step 2: Check zinc
Zn has \(3d^{10}4s^{2}\) in the atom and in \(\text{Zn}^{2+}\), so its d orbitals are always full and it is not a transition element.

Step 3: Check copper
Cu is \(3d^{10}4s^{1}\), but in the common \(\text{Cu}^{2+}\) ion it is \(3d^{9}\), which is incomplete, so Cu is a transition element.

Step 4: Compare the options
Options A, B and D are true, while the statement that Cu is also not a transition element is false.

Final Answer:
The statement that Cu is not a transition element is not true. \[ \boxed{\text{(C) }\text{On the same ground like Zn, Cu is also not considered as transition element.}} \]