The essential constituent of matter is
Electron
Proton
Neutron
None
Angular momentum of an electron in the nth orbit of hydrogen atom is given by
nh/2π
nh
2π/nh
π/2nh
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
Which among the following species have the same number of electrons in its outermost as well as penultimate shall
Mg2+
O2-
F-
Ca2+
Magnetic quantum number specifies
Orbital size
Orbital shape
Orbital orientation
Nuclear stability
The principle quantum number of an atom is related to the,
Size of the shell
Spin angular momentum
Orbital angular momentum
Orientation of the orbital in space.
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
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 electrons identified by quantum number n and 1
(i)n=4,l=1 (ii) n=4,l=0 (iii)n=3,l=2(iv)n=3,l=1 can be placed in the order of
iv<ii<iii<i
iii<iv<i<ii
i<ii<iii<iv
iv<iii<ii<i
When the azimuthal quantum number l=1, shape of the orbital will be
Spherical
Dum-bell
Double dumb-bell
Circular