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What do you underrstand by negative valu...

What do you underrstand by negative value of electro-gain enthalpy of an element?

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It signifies that energy is relased when an isolated gaseous atom of the element under consideration accepts an electron to form a monovalent gaseous anion.
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CHHAYA PUBLICATION-CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES-QUESTION-ANSWER ZONE FOR BOARD EXAMINATION
  1. Why is the size F^(-) smaller tha that of O^(2-) ion?

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  2. Compare the radii of K^(+) and Cl^(-) ions (each contain the same numb...

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  3. What do you underrstand by negative value of electro-gain enthalpy of ...

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  4. Electronic configuration of the atom of an element is 1s^(2)2s^(2)2p^(...

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  5. Atomic numbers of elements A,B and C are 10,13, & 17 respectively. (1)...

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  6. A, B and C are three elements with atomic numbers 17,18 and 20 respect...

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  7. Outer electronic configuration of 4 elements are as given below follow...

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  8. Write electronic configuration of the element with atomic number 35. w...

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  9. Justify the mentioning two reasons, the inclusion of Ca and Mg in the ...

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  10. Cu, Ag & Au are regarded as transition elements. Why?

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  11. Write down electronic configuration of the element having atomic numbe...

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  12. Can Cu (At. No. 29) and Zn (At. No. 30) be called transition elements?...

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  13. Atomic number of three elements A,B and C are 8, 13 and 17 respectivel...

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  14. Why is atomic size of Ca^(2+) smaller than that of K^(+) ?

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  15. Atomic radius of chlorine atom is 0.99 Å but ionic radius of chloride ...

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  16. First ionisation energy of elements increases with atomic numbers of t...

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  17. Ionisation potential of O is less than that of N-explain.

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  18. Explain why the Ionisation potential of inert gases are very high whit...

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  19. Which member in each of the following pairs has lower value of ionisat...

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  20. Why is the value of electron-gain enthalpy negative?

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