An ion has 18 electrons in the outermost shell, it is
Cu+
Th4+
Cs+
K+
In the photoelectron emission, the energy of the emitted electron is
greater than the incident photon
same as that of the incident photon
smaller than the incident photon
proportional to the intensity of incident photon
The electronic configuration of Cu (atomic number 29) is
1s2,2s2,2p6,3s2,3p6,4s2,3d9
1s2,2s2,2p6,3s2,3p6,3d10,4s1
1s2,2s2,2p6,3s2,3p6,4s2,4p6,5s2,5p1
1s2,2s2,2p6,3s2,3p6,4s2,4p6,3d3
The electronic configuration of gadolinium (At no 64) is
[Xe]4f8 ,5d9 ,6s2
[Xe] 4f7 ,5d1 ,6s2
[Xe] 4f6 ,5d2 ,6s2
[Xe] 4d3 ,5d5 ,6s2
The number of spherical nodes in 3p orbital is/are
one
three
two
None of these
The orientation of an atomic orbital is governed by
azimuthal quantum number
spin quantum number
magnetic quantum number
principal quantum number
Which of the following is not permissible arrangement of electrons in an atom ?
n = 4, l = 0, m = 0, s = -1/2
n = 5, l = 3, m = 0, s = + 1/2
n = 3, l = 2, m = -3, s = -1/2
n = 3, l = 2, m = -2, s = -1/2
The spectrum of He is expected to be similar to that of
H
Na
Li+
He+
Consider the following sets of quantum numbers
n l m s
(i) 3 0 0 +1/2
(ii) 2 2 1 +1/2
(iii) 4 3 -2 -1/2
(iv) 1 0 -1 -1/2
(v) 3 2 3 +1/2
Which of the following sets of quantum number is not possible ?
(ii), (iii) and (iv)
(i), (ii), (iii) and (iv)
(ii), (iv) and (v)
(i) and (iii)
In hydrogen atom, energy of first excited state is -3.4 eV. Then, KE of same orbit of hydrogen atom is
+ 3.4 eV
+ 6.8 eV
- 13.6 eV
+ 13.6 eV
