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Summarise the rules for writing the dist...

Summarise the rules for writing the distributiion of electones in varius shells for first eighteen elements

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Summarise the rules for writing of distribution of electrons in various shells for the first eighteen elements.

(a) state the postulates stated by neils bohr in order to overcome the objection as raised against Ruthford's model of atom. (b) summarise the rules for the distrubution of elctrons in the first eighteen elements

(a) Explain Bohr and Bury rules for distrubution of electrons into different shells. (b) Draw the electronic structure of element X with atomic number 17 and element y with atomic number 16?

Write the distribution of electrons in an atom of element whose atomic number is 18. What is special about the outermost electron shell (or valence shell) of the atom of this element ?

DINESH PUBLICATION-STRUCTURE OF ATOM -N.C.E.R.T End Exercise
  1. Compare the properties of electrons, protons and neutrons.

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  2. What are the limitations of J.J. Thomson’s model of the atom?

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  3. What are the limitations of Rutherford's model of the atom ?

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  4. What are the postulates of Bohr's model of an atom?

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  5. Compare all the proposed models of an atom given in this chapter.

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  6. Summarise the rules for writing the distributiion of electones in vari...

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  7. Define valency by taking the examples of silicon and oxygen.

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  8. Explain with examples (i) Atomic number (ii) Mass number (iii) Isotope...

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  9. Na^(+) has completely filled K and L shells. Explain.

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  10. Bromine occurs in nature mainly in the form of two isotopes .(35)^(79)...

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  11. The average atomic mass of a sample of an element X is 16.2 mu. What i...

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  12. If Z = 3, what would be the valency of the element? Also, name the ele...

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  13. Composition of the nuclei of two atomic species X and Y are given as u...

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  14. For the following statements, write T for true and F for false : (a)...

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  15. Rutherford's alpha particle scattering experiment was responsible for ...

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  16. Isotopes of an element have : (a) the same physical properties (b)...

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  17. Number of valence electrons in Cl^(– ) ion are:

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  18. Which one of the following is a correct electronic configuration of so...

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  19. Complete the following table:

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