The presence of electrons outside the nucleus and the nucleus at the centre of the atom was suggested by:
- AElectrons by $J.J.$ Thomson and nucleus by $E.$ Rutherford
- BElectrons by $J.J.$ Thomson and nucleus by $E.$ Goldstein
- CElectrons by $J.N.$ Lockyer and nucleus by $E.$ Rutherford
- DElectrons by $E.$ Rutherford and nucleus by $J.J.$ Thomson
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Similar Questions
$(a)$ Explain why did Rutherford select a gold foil in his alpha scattering experiments?
$(b)$ What observations in $\alpha$-scattering experiment led Rutherford to make the following conclusions?
$(i)$ Most of the space in an atom is empty.
$(ii)$ Nucleus is positively charged.
$(c)$ Mention any two drawbacks of Rutherford's model.
$(b)$ What observations in $\alpha$-scattering experiment led Rutherford to make the following conclusions?
$(i)$ Most of the space in an atom is empty.
$(ii)$ Nucleus is positively charged.
$(c)$ Mention any two drawbacks of Rutherford's model.
Medium
View SolutionThe following data represents the distribution of electrons,protons,and neutrons in atoms of four elements $A, B, C, D.$
Element Protons,Neutrons,Electrons $A$ $9, 10, 9$ $B$ $16, 16, 16$ $C$ $12, 12, 12$ $D$ $17, 22, 17$
Answer the following questions:
$(a)$ Give the electronic distribution of element $B.$
$(b)$ The valency of element $A$.
$(c)$ The atomic number of element $B.$
$(d)$ The mass number of element $D$.
| Element | Protons,Neutrons,Electrons |
| $A$ | $9, 10, 9$ |
| $B$ | $16, 16, 16$ |
| $C$ | $12, 12, 12$ |
| $D$ | $17, 22, 17$ |
Answer the following questions:
$(a)$ Give the electronic distribution of element $B.$
$(b)$ The valency of element $A$.
$(c)$ The atomic number of element $B.$
$(d)$ The mass number of element $D$.
Medium
View SolutionThe charge on an electron is equal to
Easy
View SolutionWrite the names of three elementary particles which constitute an atom. Which of these particles determine the mass of an atom? Justify your answer with an example.
Medium
View SolutionSulphur dioxide $(SO_{2})$ is a colourless,pungent-smelling gas and is a major air pollutant.
$(a)$ Write the electronic configuration of its constituent elements,sulphur and oxygen.
(Given: $_{16}^{32}S, _{8}^{16}O)$
$(b)$ Write the valency of sulphur and oxygen.
$(c)$ Are sulphur and oxygen isotopes of the same element? Explain your answer.
$(a)$ Write the electronic configuration of its constituent elements,sulphur and oxygen.
(Given: $_{16}^{32}S, _{8}^{16}O)$
$(b)$ Write the valency of sulphur and oxygen.
$(c)$ Are sulphur and oxygen isotopes of the same element? Explain your answer.
Medium
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