Will Cl 35 and Cl 37 have different valencies? Justify your answer.

No, both Cl 35 and Cl 37 will have same valencies as they are the isotopes of the same element. That is, isotopes have the same number of electrons and protons. They differ only in the number of neutrons and hence their electron distribution will be same.

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NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Multiple Choice Questions>Q 14

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An atom with $3$ protons and $4$ neutrons will have a valency of

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Important Questions on Structure Of The Atom

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NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Multiple Choice Questions>Q 15

The electron distribution in an aluminium atom is

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NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Multiple Choice Questions>Q 16

Which of the following figures do not represent Bohr's model of an atom correctly?

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NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Multiple Choice Questions>Q 17

Which of the following statement is always correct?

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NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Multiple Choice Questions>Q 18

Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order
(i) Rutherford's atomic model
(ii) Thomson's atomic model
(iii)Bohr’s atomic model

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NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Short Answer Questions>Q 19

Is it possible for the atom of an element to have one electron, one proton and no neutron. If so, name the element.

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NCERT Exemplar Science - Class 9>Chapter 4 - Structure Of The Atom>Short Answer Questions>Q 20

Write any two observations which support the fact that atoms are divisible.

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