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Write the distribution of electrons in a...

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 ?

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The correct Answer is:
`underset("2, 8, 8")("K L M")` ; The outermost electron shell (M shell) of the atom of this element is completely filled with electrons
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LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise
  1. Name the particles used by Rutherford in his experiment on the discove...

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

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

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

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

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

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

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

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  9. How does an electron differ from a neutron ?

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

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  11. Fill in the following blanks :

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

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

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

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

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

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

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

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

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  20. The subatomic particle called electron was discovered by :

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