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Structure of th...

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  • Question 1
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    Which of the following elements has odd number of electrons in its valence shell?

  • Question 2
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    Most of the mass of the atom resides in the _____ .

  • Question 3
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    The electronic configuration of aluminium is:

  • Question 4
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    Fill in the blank and complete the analogy by choosing correct alternative from the options given.

    Neon : (2, 8) : : Argon : _________

  • Question 5
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    Which element has three shells with $$5$$ electrons in its valence shell?

  • Question 6
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    In 1911, __________ came to the conclusion that the atom had a dense nucleus because most of the particles shot straight through, but some of the particles were deflected due to the dense nucleus of the gold atoms.

  • Question 7
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    According to J.J. Thomson's atomic model, negative charges are embedded in:

  • Question 8
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    In Thomson's plum-pudding model, electrons are not:

  • Question 9
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    Rutherford's alpha-particle scattering experiment was responsible for the discovery of:

  • Question 10
    1 / -0

    Thomson's model was rejected because :

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