Bohr Model of The Atom Modern Atomic Theory
Bohr Model of The Atom Modern Atomic Theory
Bohr’s Model of an Atom: To overcome the objections raised against Rutherford’s model of the atom, Neil Bohr put forward the following postulates about the model of an atom:
Evidences in Support of Divisibility of Atom: Following observations show that atom is made up of different particles like electrons, protons and neutrons, i.e. atom is divisible:(i) Formation of ionic compounds is possible due to the formation of ions which involves the transfer of electrons.(ii) Presence of isotopes for the same element is possible due to the difference in the number neutrons.
"Electrons revolve in specific orbits or energy levels". This is a postulate of : | |||
| Right Option : B | |||
| View Explanation | |||
Which of the following statement / statements are correct : (a) Energy of an electron remains same as long as it remains in discrete orbit and it does not radiate energy while revolving. (b) Starting from nucleus, energy levels (orbits) are represented by numbers (1, 2, 3, 4 etc.) or by alphabets (K, L, M, N etc.). | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following statement / statements are correct : (a) Energy of an electron remains same as long as it remains in discrete orbit and it does not radiate energy while revolving. (b) Atom consists of negatively charged nucleus around which electrons revolve in discrete orbits, i.e. electrons revolve in certain permissible orbits and not just in any orbit. (c) The electrons present in first energy level (E1) have lowest energy. Energies increases on going towards outer energy levels. | |||
| Right Option : B | |||
| View Explanation | |||
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