Question

Consider a ground state calcium atom. Which of the following statements is FALSE?

A. The electron configuration of the calcium atom is [Ar]4s^2

B. Two electrons occupy the 3s orbital; a spherically shaped orbital.

C. One of the numerous electrons in the 3p orbitals corresponds to the set of quantum numbers: n=1, l=2,ml=0,ms=+1/2

D. The calcium atom has a total of 20 electrons

E. The electrons occupying the 1s orbital are lower in ergy than the electrons occupying the 2s orbital.

Answer 1

. . CacAtomic no = 20) ground state Cax7 45² (B) Co » TY] 4 sº or 25² 25² 2p 6 3 5² 3p6 45² AY there are two elees in 35 orbital [35 orbit's shape - spherical] for 3p orbit n=3 = 1 (for p-orbital) me = --- 01 - tl some = -1,0,t1 ms = ± 1/2 • in statement (C) n=1 & f= 2 is given that is not right for "3p" orbit n= 1 & e=2 1d (f=2₃d) that is not in existence (D) . Ca atomic No. (Z) =20 - no. of elees =20 [ground state]

E). . Energy of 1s elees < Energy of as eleos Because we 1st fill elees in lower energy orbits and than fill the higher energy odbit