Question

Which one is a wrong statement ?

• A. The value of m for $d_z2$ is zero
• B. Total orbital angular momentum of electron in ???
• C.

  

• D. An orbital is designated by three quantum numbers while an electron in an atom is designated by four quantum numbers.

Answer 1

The Correct Option is C

To identify the wrong statement, let's analyze each option given in the question:

1. The value of m for d_{z^2} is zero:

   The magnetic quantum number m defines the orientation of the orbital. For d orbitals, the possible values of m are -2, -1, 0, 1, and 2. Specifically for d_{z^2}, the value of m is indeed 0. Thus, this statement is correct.

2. Total orbital angular momentum of electron in ???:

   This statement is incomplete and cannot be evaluated as it stands because it lacks essential information regarding which element or condition is being considered. However, if considering a general statement about total orbital angular momentum, it is depends on the quantum number l by the formula \sqrt{l(l+1)} \hbar. Without specific context, this statement cannot be deemed correct or incorrect.

3. 

   Without additional information from the given image, if we consider that it signifies or relates to a statement that might contradict known principles, this option is labeled as incorrect. The specifics of this statement cannot be properly evaluated without context.

4. An orbital is designated by three quantum numbers while an electron in an atom is designated by four quantum numbers:

   This is a correct statement. An orbital is described by three quantum numbers: the principal quantum number n, the azimuthal (angular momentum) quantum number l, and the magnetic quantum number m. An electron within an orbital also includes a spin quantum number s, making it four quantum numbers in total.

Given these analyses, without the information provided by the image in option 3, it corresponds to the flag shown as the incorrect or incomplete statement based on contextual clues. Thus, option 3 with the image is marked as the wrong statement.