The four quantum numbers for the electron in the outer most orbital of potassium (atomic no. 19) are (A) n 4, l = 2, m 1, 2 s (B) n 4, l = 0, m , 2 s (C) n 3, l = 0, m , 2 s (D) n , l = 0, m , 2 s

Question

The four quantum numbers for the electron in the outer most orbital of potassium (atomic no. 19) are

(A) n 4, l = 2, m 1, 2 s
(B) n 4, l = 0, m , 2 s
(C) n 3, l = 0, m , 2 s
(D) n , l = 0, m , 2 s

Prashant Kotian · Accepted Answer

Correct answer: B. :- 19K 2 2 1 1s , 2s , 2p , 3s , 3p , 4s . Outermost orbital of potassium is 4s orbital l n 4, l 0, m 0, s     . $//(1® Final JEE-Main Exam January, 2024/31-01-2024

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