write the main postulates of Bohr's model of atom
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THE MAIN POSTULATES OF BOHR'S ATOMIC THEORY ARE:
1. The electrons revolving around the nucleus are confined to certain fixed orbits called shells or energy levels ,each of which is associated with a fixed amount of energy.
2. While it is revolving around the nucleus in an orbit, an electron neither loses not gains energy.
3. An electron revolving in a particular orbit, in gaining a certain amount of energy, jumps to the next orbit and vice versa. Since each orbit is associated with a fixed amount of energy, Bohr called it an energy level.
1. The electrons revolving around the nucleus are confined to certain fixed orbits called shells or energy levels ,each of which is associated with a fixed amount of energy.
2. While it is revolving around the nucleus in an orbit, an electron neither loses not gains energy.
3. An electron revolving in a particular orbit, in gaining a certain amount of energy, jumps to the next orbit and vice versa. Since each orbit is associated with a fixed amount of energy, Bohr called it an energy level.
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the important points of this theory are:
1.electrons revolve around the nucleus in a definite circular path called orbits or shells
2.in this orbits energy is constant so this are called stationary orbits.
3.this orbits are denoted by the letters K,L,M,N,O.....
4.when an electron jumps from higher energy level to lower energy level it emits some amount of energy (hu)
∆E=E2-E1
E2=higher energy level
E1=lower energy level
5.the angular momentum of the electrons is the integral multiple of h/2π
MVR=nh/2π
where,m is mass of the electron
v is velocity of the electron
r is radius of the electron
n is integer that is 1,2,3,4,5,.....
h is planks constant
=6.023×10to the power of -23 joules/mole
6.023×10to the power of -27 ergs/mole.
π=22/7.
hope this answer is helpful to u
1.electrons revolve around the nucleus in a definite circular path called orbits or shells
2.in this orbits energy is constant so this are called stationary orbits.
3.this orbits are denoted by the letters K,L,M,N,O.....
4.when an electron jumps from higher energy level to lower energy level it emits some amount of energy (hu)
∆E=E2-E1
E2=higher energy level
E1=lower energy level
5.the angular momentum of the electrons is the integral multiple of h/2π
MVR=nh/2π
where,m is mass of the electron
v is velocity of the electron
r is radius of the electron
n is integer that is 1,2,3,4,5,.....
h is planks constant
=6.023×10to the power of -23 joules/mole
6.023×10to the power of -27 ergs/mole.
π=22/7.
hope this answer is helpful to u
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