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Which of the following designation is im...

Which of the following designation is impossible ?

A

4f

B

5g

C

2d

D

6p

Text Solution

AI Generated Solution

The correct Answer is:
To determine which of the following designations is impossible, we need to understand the rules governing the designation of atomic orbitals. The designations consist of a principal quantum number (n) and a letter representing the type of orbital (s, p, d, f, g, etc.). ### Step-by-Step Solution: 1. **Understanding Quantum Numbers**: - The principal quantum number (n) indicates the shell or energy level of the electron. - The letter designation (s, p, d, f, g) indicates the type of subshell. 2. **Identifying Allowed Subshells**: - The subshells have specific rules regarding their principal quantum numbers: - **s subshell**: starts from n=1 (1s) - **p subshell**: starts from n=2 (2p) - **d subshell**: starts from n=3 (3d) - **f subshell**: starts from n=4 (4f) - **g subshell**: starts from n=5 (5g) 3. **Analyzing Each Designation**: - **4f**: Possible (f subshell starts from n=4) - **5g**: Possible (g subshell starts from n=5) - **2d**: Impossible (d subshell starts from n=3, so 2d cannot exist) - **6p**: Possible (p subshell starts from n=2) 4. **Conclusion**: - The impossible designation among the given options is **2d**. ### Final Answer: The impossible designation is **2d**.
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