Correct statements for an element with atomic number 9 are:

A. There can be 5 electrons for which and 4 electrons for which

B. There is only one electron in orbital

C. The last electron goes to

Question

Correct statements for an element with atomic number 9 are:

A. There can be 5 electrons for which  and 4 electrons for which

B. There is only one electron in  orbital

C. The last electron goes to orbital with  and

D. The sum of angular nodes of all the atomic orbitals is 1

Choose the correct answer from the options given below:

Canvas Classes · Accepted Answer

Step 1: Write electronic configuration of F (Z = 9)

Orbital filling:

Step 2: Evaluate each statement

(A) Electrons with : one from each orbital (by Hund's rule, first electron in each orbital is spin-up):
- : 1 up, : 1 up, : 1 up, : 1 up, : 1 up = 5 electrons with  ✓
- Remaining 4 electrons all have  ✓ → A is TRUE

(B)  has only 1 electron (the last one added). → B is TRUE

(C) Last electron goes to  orbital: ,  → C is TRUE

(D) Angular nodes =  for each orbital.
-  (×2): , 0 angular nodes

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