The energy of second Bohr orbit of the hydrogen atom is – 328 k J/ mol ; hence the energy of fourth Bohr orbit would be
41 KJ/mol
-1312 KJ/mol
-164 KJ/mol
-82 LK/mol
When the azimuthal quantum number l=1, shape of the orbital will be
Spherical
Dum-bell
Double dumb-bell
Circular
Which among the following species have the same number of electrons in its outermost as well as penultimate shall
Mg2+
O2-
F-
Ca2+
Maximum number electrons in a subshell of an atom is determined by the following
4l +2
2n2
4l-1
2l + 1
The essential constituent of matter is
Electron
Proton
Neutron
None
Bohr atomic model can explain
The spectrum of hydrogen atom only
Spectrum of atom or ion containing one electron only
The spectrum of hydrogen molecule
The solar spectrum
The number of nodal planes that 5d orbital has
Zero
5
Two
Three
Magnetic quantum number specifies
Orbital size
Orbital shape
Orbital orientation
Nuclear stability
In a given atom no two electrons can have the same values for all the four quantum numbers. This is called.
Hund’s rule
Aufbau principle
Uncertainty principle
Paul’s exclusion principle
Angular momentum of an electron in the nth orbit of hydrogen atom is given by
nh/2π
nh
2π/nh
π/2nh
