The distribution of electrons in various subshells of the outermost shell is called
inner shell configuration
valence shell configuration
inner shell conformation
valence shell conformation
The ratio of the masses of proton and neutron is :
>1
<1
=1
>√1
Bohr atomic model can explain the spectrum of _________.
the hydrogen atom only
the hydrogen and hydrogenic species
the hydrogen molecule
only atoms of all elements
Which of the following electronic configuration represents a noble gas?
2,8,2
2,8,6
2,8
2,8,8,2
The principal quantum number denotes the _________ of an electron.
energy sublevel
energy level
magnetic field
orbital
The electron affinity for halogens follows the order ____________.
Cl < F < I < Br
Cl > F > Br > I
F < Br < Cl < I
F < I < Br < Cl
Total number of orbitals present in the 'O' stationary state?
1
4
16
25
Number of electrons present in 4th orbit is ___________.
32
64
8
Valence electronic configuration of copper is
4s23d9
4s23d10
4s13d10
4s13d9
Mass of an electron is
9.1x10-28g
9.1x10-25g
9.1x10-10g
9.1x10-18g
