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How many electrons are present in the O ...

How many electrons are present in the `O ^(2-)` ion ?

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Electrons is `O _(2) ^(-)` ion :
For `O, Z = 8 therefore ` electrons `= 8 xx 2 + 1 = 17`
Here 1 extra `e ^(-)` is charge i.e., anion , which is formed by gain of `1 e ^(-)`
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OMEGA PUBLICATION-STRUCTURE OF ATOM -MULTIPLE CHOICE QUESTIONS (MCQ s)
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  2. Emission of beta -particle is equivatent to:

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  3. The mass of the neutron is of the order of

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  6. The value of Planck's constant is

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  7. Which of the following expresson gives the de-Broglie relationship ?

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  8. The total number of orbitals possible for the quantum number n is

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  9. The four quantum numbers of the valence electron of potassium are

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  10. An electron has principal quantum number 3. The number of its (i) shel...

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  11. The correct set of quantum numbers for a 4d electron is

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  12. No two electrons in an atom will have all the four quantum numbers sam...

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  13. The correct order of increasing energy of atomic orbitals is

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  14. The energy of an electron in nth orbit of hydrogen atom is

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  15. The triad of nuclei that is isotonic is

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  16. Bohr's model can explain

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  17. If the value of l = 2, what will be the value of principal quantum num...

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  18. Rutherford's experiment on scattering of alpha particles showed for th...

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  19. 3d-orbitals have

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