Atom has a nucleus where all protons and neutrons are present.
The size of the nucleus is very small and is present at the centre of the atom.
negatively charged electrons revolve around the nucleus.
the electrostatic force b/w nucleus and electron is equal to the centrifugal force on electron.
electrons can revolve only in those orbits in which angular momentum of electron is integral multiple of h/2pie i.e mvr=nh/2pie; n = +ve integral no. , h= planck’s const.
the orbits in which the electrons revolve are called the stationary orbits because in these orbits energy of the electrons remain const.
The emission or absorption of energy in the form of photon can only occur when electron jump from one stationary state to other.
Answers & Comments
Atom has a nucleus where all protons and neutrons are present.
The size of the nucleus is very small and is present at the centre of the atom.
negatively charged electrons revolve around the nucleus.
the electrostatic force b/w nucleus and electron is equal to the centrifugal force on electron.
electrons can revolve only in those orbits in which angular momentum of electron is integral multiple of h/2pie i.e mvr=nh/2pie; n = +ve integral no. , h= planck’s const.
the orbits in which the electrons revolve are called the stationary orbits because in these orbits energy of the electrons remain const.
The emission or absorption of energy in the form of photon can only occur when electron jump from one stationary state to other.