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First four ionisation energy values of a...

First four ionisation energy values of an element are 191, 578, 872 and 5972 K.Cals The number of valence electrons in the element is

A

4

B

3

C

1

D

2

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The correct Answer is:
B
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AAKASH SERIES-PERIODIC PROPERTIES-LEVEL -I (EAMCET) EXERCISE -III
  1. The maximum tendency to form unipositive ion is for the element with t...

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  2. As one moves along a given row in the periodic table, ionisation energ...

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  3. First four ionisation energy values of an element are 191, 578, 872 an...

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  4. Ionisation potential values of Li, Be and B are respectively in kJ "mo...

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  5. Screening effect is not common for the elements of the period

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  6. Electron affinity is

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  7. The property of an element that is not normals determined directly but...

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  8. Electron affinity is measured in

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  9. Which of the following is an endothermic process?

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  10. In a period from left to right, electron affinity

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  11. Configuration that shows the highest energy released when an electron ...

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  12. Electron affinity of Fluorine is less than that of Chlorine because

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  13. Among chalcogens electron affinity is highest for

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  14. The element with highest electron affinity is

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  15. Incorrect statement is

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  16. Pauling's electronegativity is based on

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  17. Pauling's electronegativity values for elements are useful in predicti...

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  18. Correct relation among XA, XB, and Delta, where XA, and XB are the ele...

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  19. Reference element for Pauling's electronegativity is

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  20. Electronegativity of an element is the average of its ionisation energ...

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