gneet

Study Companion

For more NEET and AIIMS mcq on Structure of Atom Visit www.gneet.com
Question
Q271) The four quantum numbers of valence electron of potassium are



SOLUTION

K = 19 = 1s2, 2s2, 2p6, 3s2, 3p6, 4s1 last e–Last electron 4s1 ∴ n = 4, l = 0, m = 0, s =1/2
Answer:(c)