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The outer most electronic configuration of the most electronegative element is:

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Important Questions on Classification of Elements and Periodicity in Properties

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 45
The first four ionisation energy values of metal are 191, 587, 872 and 5962 kcal/mol respectively. The number of valence electrons in the element is:
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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 47
In which element shielding effect is not possible?
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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 48
Poor shielding of nuclear charge by d or f-orbital electrons is responsible for which of the following facts?
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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 50
Most stable oxidation state of Thallium is +n. What is the Value of n.
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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 51
Total number of elements which have more ionization energy as compare to their next higher atomic number elements. Li, Be, C, N, O, F, Ne.
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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 52
For the gaseous reaction K+F→K++F-, ΔH was calculated to be 18.4kcal/mol under conditions where the cations and anions were perverted from combining with each other. The ionisation enthalpy of K is 4.3eV/atom. What is the electron gain enthalpy of F (in eV)? If your answer is x report it as -2x.
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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 53

How many elements are more electropositive than Cl.

B, N, O, C, S, P, H, Li

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 56
The lithium-ion Li+ and hydride ions H- are isoelectronic ions. Which statement about these systems is true?