$(i)$ Write the postulates of the Bohr model of an atom.
$(ii)$ Draw a sketch of the Bohr model of an atom with atomic number $15$.
$(ii)$ Draw a sketch of the Bohr model of an atom with atomic number $15$.
(N/A) $(i)$ The postulates of the Bohr model of an atom are as follows:
- Only certain special orbits,known as discrete orbits of electrons,are allowed inside the atom.
- While revolving in these discrete orbits,the electrons do not radiate energy.
$(ii)$ For an atom with atomic number $15$ (Phosphorus),the electronic configuration is $2, 8, 5$. The sketch shows the nucleus at the center,surrounded by three shells $(K, L, M)$: the $K$-shell contains $2$ electrons,the $L$-shell contains $8$ electrons,and the $M$-shell contains $5$ electrons.
- Only certain special orbits,known as discrete orbits of electrons,are allowed inside the atom.
- While revolving in these discrete orbits,the electrons do not radiate energy.
$(ii)$ For an atom with atomic number $15$ (Phosphorus),the electronic configuration is $2, 8, 5$. The sketch shows the nucleus at the center,surrounded by three shells $(K, L, M)$: the $K$-shell contains $2$ electrons,the $L$-shell contains $8$ electrons,and the $M$-shell contains $5$ electrons.
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Answer the following in one line or one word:
$(a)$ Who discovered the neutron?
$(b)$ On the basis of Thomson's model of an atom,explain how the atom is neutral as a whole.
$(c)$ What is the maximum number of electrons that can be accommodated in the outermost shell of an atom?
$(d)$ What term is assigned to the atoms of different elements having the same atomic mass but different atomic numbers?
$(e)$ How many neutrons are present in a hydrogen atom?
$(a)$ Who discovered the neutron?
$(b)$ On the basis of Thomson's model of an atom,explain how the atom is neutral as a whole.
$(c)$ What is the maximum number of electrons that can be accommodated in the outermost shell of an atom?
$(d)$ What term is assigned to the atoms of different elements having the same atomic mass but different atomic numbers?
$(e)$ How many neutrons are present in a hydrogen atom?
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$(iii)$ Can be compared to the solar system.
$(iv)$ Was in agreement with Thomson's model.
$(i)$ Considered the nucleus as positively charged.
$(ii)$ Established that the $\alpha$-particles are four times as heavy as a hydrogen atom.
$(iii)$ Can be compared to the solar system.
$(iv)$ Was in agreement with Thomson's model.
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