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An element has atomic number 13 and an a...

An element has atomic number `13` and an atomic mass of `27`
(a) How many electrons are there in each atom of the element ?
(b) How are these electrons distributed in the various energy levels ?

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The correct Answer is:
(a) 13 (b) `underset("2, 8, 3")("K L M")`
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LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise
  1. (a) What is the nucleus of an atom and what is the nature of charge on...

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  2. Name the particles used by Rutherford in his experiment on the discove...

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  3. An element has atomic number 13 and an atomic mass of 27 (a) How many...

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  4. Write the distribution of electrons in an atom of element whose atomic...

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  5. What is a neutron ? How does it differ from a neutron ?

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  6. Compare an electron, a proton and a neutron in respect of their relati...

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  7. What is a proton ? How does it differ from a neutron ?

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  8. Compare an electron and a proton in respect of mass and charge.

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  9. Compare a proton and a neutron in respect of mass and charge.

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  10. How does an electron differ from a neutron ?

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  11. State the location of electrons, protons, protons and neutrons in an a...

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  12. Fill in the following blanks :

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  13. Fill in the following blanks in respect of an atom of an element :

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  14. (a) Describe Thomson's model of the atom. Which subatomic particle was...

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  15. (a) Describe the Rutherford's model of an atom. State one drawback of ...

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  16. (a) Describe Bohr's model of the atom. How did Neils Bohr explain the ...

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  17. (a) What is mean by (i) atomic number, and (ii) mass number, of an ele...

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  18. Rutherford's alpha particle scattering experiment led to the discovery...

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

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  20. Which subatomic particle is not present in an ordinary hydrogen atom ?

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