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Helium atom has an atomic mass of 4 u an...

Helium atom has an atomic mass of 4 u and two protons in its nucleus. Howmany neutrons does it have ?

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MBD-STRCTURE OF ATOM-Example
  1. What do you think what would be the observation if the a-particle scat...

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  2. Name the three sub-atomic particles of an atom,

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  3. Helium atom has an atomic mass of 4 u and two protons in its nucleus. ...

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  4. Write the distribution of electrons in carbon and sodium atoms.

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  5. If K and L shell of an atom are full then what would be the total numb...

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  6. How will you find the valency of chlorine, sulphur and magnesium ?

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  7. If number of electrons in an atom is 8 and number of protons is also 8...

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  8. If number of electrons in an atom are 8 and number of protons are also...

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  9. find out the mass of oxygen and sulphur atom.

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  10. For the symbol H,D and T tabulate three fundamental particles found in...

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  11. Write the electronic configuration of any one pair of isotopes and iso...

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  12. Compare the properties of electron, proton and neutron

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  13. What are the limitations of J.J. Thomson model of atom ?

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

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  15. Describe Bohr's model of atom.

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  16. Compare all the proposed models of atom given in the chapter 3 of the ...

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  17. Summarize the rules for writing of distribution of electrons in variou...

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  18. Define valency by taking examples of silicon and oxygen.

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  19. Explain with examples : Atomic number

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  20. Explain with examples : Mass number

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