Principle, azimuthal and magnetic quantum numbers are respectively related to
Size, orientation and shape
Size, shape and orientation
Shape, size and orientation
None of the above
The electronic configuration of a dipositive ion Mn2+ is 2, 8, 14 and its mass number is 56. The number of neutrons present is
34
42
30
32
Angular momentum of an electron in the nth orbit of hydrogen atom is given by
nh/2π
nh
2π/nh
π/2nh
Bohr’s model is
Successful in calculating energy of the helium atoms
Successful in calculating energy of hydrogen like atoms
Successful in calculating energy of lithium like atoms
Splitting of spectral lines under the influence of magnetic field is
Zeemen effect
Stack effect
Photo electric effect
Raman effect
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
Which among the following species have the same number of electrons in its outermost as well as penultimate shall
Mg2+
O2-
F-
Ca2+
The essential constituent of matter is
Electron
Proton
Neutron
None
The maximum energy is possessed by an electron, when it is present
in nucleus
In ground energy state
in first excited state
at infinite distance from the nucleus.
The number of nodal planes that 5d orbital has
Zero
5
Two
Three
