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For which of the following elements, the...

For which of the following elements, the electron affinity values are positive?

A

`1`. Alkali metals

B

`2`. Alkaline earth metals

C

`3`. Halogens

D

`4`. Chalcogens

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VGS PUBLICATION-BRILLIANT-CLASSIFICATION OF ELEMENTS-THE PERIODIC TABLES-EXERCISE
  1. Which of the following is correct with respect to size ?

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  2. The I.E of 'N' is more than oxygen even though the size of 'O' is less...

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  3. For which of the following elements, the electron affinity values are ...

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  4. Which one does not belongs to Dobereiner's triads ?i) Lithium (7.0) - ...

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  5. Element →H to F to Cl →Co & Ni to Br to Pd to I → Pt & Ir No 1 to 8 → ...

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  6. Differentiating electrons of some elements are as given, Na = 3s^1, Al...

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  7. 11(Na) 1s^2 2s^2 2p^6 3s^1. i) It is a s- block element, ii) It's vale...

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  8. Sc = 1s^22s^2 2p^6 3s^2 3p^6s 4s^2 3d^1.this is belongs to

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  9. B, Si, Ge,  As are:

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  10. Carbon and Nitrogen belongs to groups respectively

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  11. Consider the following changes a) M((g))^(+2) rarr M((g))^(+3) + e^...

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  12. Between ""(11) Na and ""(17) Cl, which one has more ionization...

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  13. Which one is true ? i) More nuclear charge, more ionization energy. i...

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  14. Penetration power towards nucleus of various orbitals are 4s g...

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  15. Electron affinity values in (KJ mol^(-)) F(-328), Cl-(349), Br(-325), ...

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  16. F(4.0), Cl(3.0), Li(1.0), Be (1.47) Electronegativity values are give...

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  17. B, Si, Ge,  As are:

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  18. Element with electronic configuration: 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10...

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  19. In the 5^th period the orbitals being filled are

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  20. Which of the following has both members from the same period of the pe...

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