$(i)$ 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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Similar Questions
Dalton's atomic theory successfully explained:
$(i)$ Law of conservation of mass
$(ii)$ Law of constant composition
$(iii)$ Law of radioactivity
$(iv)$ Law of multiple proportions
$(i)$ Law of conservation of mass
$(ii)$ Law of constant composition
$(iii)$ Law of radioactivity
$(iv)$ Law of multiple proportions
Medium
View SolutionMatch the names of the scientists given in column $A$ with their contributions towards the understanding of the atomic structure as given in column $B$.
Column $A$ Column $B$ $(a)$ Ernest Rutherford $(i)$ Indivisibility of atoms $(b)$ $J$.$J$. Thomson $(ii)$ Stationary orbits $(c)$ Dalton $(iii)$ Concept of nucleus $(d)$ Neils Bohr $(iv)$ Discovery of electrons $(e)$ James Chadwick $(v)$ Atomic number $(f)$ $E$. Goldstein $(vi)$ Neutron $(g)$ Mosley $(vii)$ Canal rays
| Column $A$ | Column $B$ |
| $(a)$ Ernest Rutherford | $(i)$ Indivisibility of atoms |
| $(b)$ $J$.$J$. Thomson | $(ii)$ Stationary orbits |
| $(c)$ Dalton | $(iii)$ Concept of nucleus |
| $(d)$ Neils Bohr | $(iv)$ Discovery of electrons |
| $(e)$ James Chadwick | $(v)$ Atomic number |
| $(f)$ $E$. Goldstein | $(vi)$ Neutron |
| $(g)$ Mosley | $(vii)$ Canal rays |
Medium
View SolutionWhich of the following statements is always correct?
Easy
View Solution$(a)$ $_{12}^{24} Mg$ and $_{12}^{26} Mg$ are symbols of two isotopes of magnesium. Compare atoms of these isotopes with respect to:
$(i)$ composition of their nuclei.
$(ii)$ electronic configuration and valency.
$(b)$ Give the reason why two isotopes of magnesium have different mass number.
$(i)$ composition of their nuclei.
$(ii)$ electronic configuration and valency.
$(b)$ Give the reason why two isotopes of magnesium have different mass number.
Medium
View SolutionWhich of the following statements are true for an element?
$(i)$ Atomic number $=$ number of protons $+$ number of electrons
$(ii)$ Mass number $=$ number of protons $+$ number of neutrons
$(iii)$ Atomic mass $=$ number of protons $=$ number of neutrons
$(iv)$ Atomic number $=$ number of protons $=$ number of electrons
$(i)$ Atomic number $=$ number of protons $+$ number of electrons
$(ii)$ Mass number $=$ number of protons $+$ number of neutrons
$(iii)$ Atomic mass $=$ number of protons $=$ number of neutrons
$(iv)$ Atomic number $=$ number of protons $=$ number of electrons
Medium
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