What are the postulates of Bohr's model of an atom?
(N/A) The postulates put forth by Neils Bohr regarding the model of an atom are as follows:
$(i)$ Only certain special orbits,known as discrete orbits of electrons,are allowed inside the atom.
$(ii)$ While revolving in these discrete orbits,the electrons do not radiate energy. These orbits are called energy levels or shells. Energy levels in an atom are represented by circles. These orbits are denoted by the letters $K, L, M, N, \dots$ or by the numbers $n = 1, 2, 3, 4, \dots$.
$(i)$ Only certain special orbits,known as discrete orbits of electrons,are allowed inside the atom.
$(ii)$ While revolving in these discrete orbits,the electrons do not radiate energy. These orbits are called energy levels or shells. Energy levels in an atom are represented by circles. These orbits are denoted by the letters $K, L, M, N, \dots$ or by the numbers $n = 1, 2, 3, 4, \dots$.
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Study the table given below and answer the questions that follow:
Particle Electrons Protons Neutrons $M$ $2$ $3$ $4$ $N$ $10$ $9$ $10$ $O$ $8$ $8$ $8$ $P$ $8$ $8$ $10$
$(a)$ Write the mass numbers of particles $M, N, O$ and $P$.
$(b)$ Select a cation and an anion from the above table.
| Particle | Electrons | Protons | Neutrons |
|---|---|---|---|
| $M$ | $2$ | $3$ | $4$ |
| $N$ | $10$ | $9$ | $10$ |
| $O$ | $8$ | $8$ | $8$ |
| $P$ | $8$ | $8$ | $10$ |
$(a)$ Write the mass numbers of particles $M, N, O$ and $P$.
$(b)$ Select a cation and an anion from the above table.
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$(b)$ What observations in $\alpha$-scattering experiment led Rutherford to make the following conclusions?
$(i)$ Most of the space in an atom is empty.
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$(i)$ Most of the space in an atom is empty.
$(ii)$ Nucleus is positively charged.
$(c)$ Mention any two drawbacks of Rutherford's model.
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$(b)$ Write the electronic configuration of an atom of sulphur. Also,draw a schematic diagram of its atom showing the distribution of electrons in its shells.
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View SolutionWhich of the following statements is always correct?
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