(1) As long as an electron revolves in a particular orbit , the electron does not lose its energy Therefore, these orbits are called stationary orbits and the electrons are said to be in station-ary energy state (2) Each orbit or shell is associated with a definite amount of energy . Hence , these are also called energy levels An electron jumps from a lower energy level to a higher energy level , by absorting energy . It jumps from a higher energy to a lowerlevel by emmitting energy in the form of electromagnetic radiation Electrons move around the nucels in specified circular paths called orbits or shells or energy levels and are designated as K,L,M and N shells respectively Arrange the above postulates of Bohr's theory in a correct sequence

(1) As long as an electron revolves in a particular orbit , the electr

1.	(1) As long as an electron revolves in a particular orbit , the electron does not lose its energy Therefore, these orbits are called stationary orbits and the electrons are said to be in station-ary energy state (2) Each orbit or shell is associated with a definite amount of energy . Hence , these are also called energy levels An electron jumps from a lower energy level to a higher energy level , by absorting energy . It jumps from a higher energy to a lowerlevel by emmitting energy in the form of electromagnetic radiation Electrons move around the nucels in specified circular paths called orbits or shells or energy levels and are designated as K,L,M and N shells respectively Arrange the above postulates of Bohr's theory in a correct sequence
Answer» 4,1.3,2 4,2,1,3 4,1,2,3 2,4,1,3 Solution :ELECTRONS move around the nucleus in SPECI- fied circular paths called orbits or shells or energy levels and are designated as K, L, M and N_ shells respectively Each orbit or shell is associated with a definite 'amount of energy. Hence, these are also CALLEDENERGY levels.' (iii) .As long as the electron revolves in a particu - lar orbit, the electron does not lose its energy Therefore, these orbits are 'called stationary orbits and the electrons are said to be in sta- tionary energy states. An electron jumps from a lower to a higher energy level by absorbing energy. It jumps from a higher to a lower energy level by emit- ting energy in the form of ELECTROMAGNETIC RADIATION.