As long as electrons are revolving in fixed circular orbits , they don’t ……..energy.
a) gain
b) lose
c) a & b both
d) have
Explanation:When
the electron is in the shell it doesn’t gain or lose
energy and give line spectrum.
When an electron jumps from higher energy orbit to lower energy
orbit it ……. energy.
a) radiates
b) gains
c) a & b both
d)
no difference occurs
When an electron jumps from lower energy orbit to higher energy
orbit it…….energy.
a) absorbs
b) radiates
c) a & b both
d) no difference occurs
The energy difference between two energy levels is ………..
a) hƲ
b) h/c
c) mvr
d) mv/r
Electron can’t stay in ……….
a) orbits
b) free state
c) in between orbits
d) all of these
Explanation:Electrons can stay in only in shells not between them.
Angular momentum of an electron is equal to.
a) mv/r
b) mvr
c) hƲ
d) h/c
