What is the frequency of a light wave whose period is 2.0 x 10-10 s ?
5 x 109 s
4 x 109 s
5 x 109 s-1
4 x 109 s-1
Dual character of an electron was explained by
Bohr
Heisenberg
de-Broglie
Pauli
In a molecule, electrons are present in new orbitals called :
Molecular orbitals
Spherical orbital
Hexagonal orbital
None of these
p-orbitals have the shape :
Spherical
Dumb-bell
Dough nut shape
Hexagonal
Dual nature of an electron was explained by :
Shape of s-orbital is :
Tetrahedral
Calculate the velocity of an electron having wavelength of 0.15 nm. Mass of an electron is 9.109 x 10-28 g. (h=6.626 x 10-27 ergs)
4.85 x 108 cms-1
2.062 x 10-15 cms-1
2.068 x 10-10 cms-1
4.85 x 10-8 cms-1
For an electron(or any other material particle) of mass m moving with velocity V, λ= ____________ .
h/mv
h/v2
mv2/c
hc2/m
Particle nature of electron was experimently demonstrated by :
Max Bon
J.J. Thomson
De-Broglie
Shrodinger
In water molecule, the electronegative oxygen atom forms two polar covalent bonds with ________ atoms.
C
H
S
N