The uncertainty principle was proposed by
De Broglie
Davisson
Max Planck
Heisenberg
If the speed of electron in the Bohr's first orbit of hydrogen atom is 'V' then the speed of the electron in the fourth orbit is
4V
V/4
V/2
V/16
The number of electrons in K19 which have n = 3 and l = 1 is
6
8
2
1
Electrons in various orbital are filled in the increasing order of
(n + s) value
(n + m) value
(n + l) value
(l + m) value
A d- orbital can accommodate
10 electrons
5 electrons
2 electrons with parallel spin
2 electrons with opposite spin
The Planck's constant has a unit of
Energy
Work
Angular momentum
Linear momentum
The spectral line obtained when an electron jumps from n = 6 to n = 4 energy level belongs to
Paschen series
Brackett series
Lyman series
none of these
The statement incorrect for hydrogen atom is
Its electronic configuration is 1s1
It has no neutron
It is the smallest atom
It exists in two isotopic forms
The probability of finding the electron at a distance 'r' from the nucleus regardless of the direction is
3/4 πr3 R3
4/3 πr3 R2
4π r2 R2
4/3π r3 R