The four quantum numbers for the electron in the outer most orbital of potassium (atomic no. 19) are
- (A)
- (B)✓ Correct
- (C)
- (D)
Answer: (B)
Solution
Potassium (Z = 19): . The outermost (valence) electron occupies the 4s orbital.
For this electron: ; (s-subshell); (the only allowed value when ); .
For this electron: ; (s-subshell); (the only allowed value when ); .
JEE Main · 2024 · 31 Jan 2024 · Shift 2 · Single correct option