As we move outward from the nucleus or they are represented the letter K, L, M, N, etc. As energy of the orbits is fixed these are also called as stationary state. In a particular atom, the orbit in electron revolves are the discrete orbits, therefore also called shell energy levels.Answer: A atom consists of a small heavy positively charged nucleus in the centre and the electron revolves around the nucleus in a circular path called orbits.Energy of electron in bohr’s orbits, (En) = 2.18×10 -18Z 2/n 2 in joule.ġ) What is the concept of Bohr’s model of atom?Īnswer: The most important concept of this model of atom was that electron revolves only in certain fixed orbits around the nucleus without losing energy in the form of radiation.Ģ) Write the postulates of Bohr’s model of atom?.Radius of bohr’s orbits = 0.0529n 2/Z nm.It loses or emits energy and jump back to some inner energy levels. In the excited state, the atom is not stable. The atom is then said to be in the excited state.Thus energy fall of an electron and it absorbs this energy it will jump to some outer shell. Energy lost or gained is equal to the difference of energy of the two energy levels evolved. The energy lost or gained of electron only when it jumps one orbits to other.This state of the atom with lowest energy is called ground state of atom. ![]() Thus the atom is stable and does not collapse. ![]() It can neither loss energy nor gain energy. So long as on electron is revolves in a particular orbits.However the gap between successive energy, energy levels or shell around the nucleus.By E 1, E 2, E 3 E 4, We have E 1E 3>E 4 etc. Thus representing the energy of 1 st 2 nd 3 rd 4 thshell etc. The energy of these shell increases as we move outward from the nucleus. A atom consists of a small heavy positively charged nucleus in the centre and the electron revolves around the nucleus in a circular path called orbits.Those electron orbital are reoffered to as shell or energy levels. Similarly in the atomic structure, The nucleus act like a sun located at the centre and the electron like planets which revolves in a fixed, definite orbital. They always encircle the sun in definite path. We never find any planet to jumping to different path all of sudden. But have you notice that planet always revolves around the sun in fixed path. It appear some what like this, Now here the sun is stationary at the centre while the planet revolves around it. The most important concept of this model of atom was that electron revolves only in certain fixed orbitsaround the nucleus without losing energy in the form of radiation. ![]() To explain stability of the atom Niel Bohr a Danish physicst in 1913 proposed new model of atom.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |