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Among the elements, B, Al, C and Si, a...

Among the elements, B, Al, C and Si,
a) which element has the highest first ionisation enthalpy?
b) which element has the most metallic character? Justify your answer in each case,

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`(i) C (ii) C (iii) Al (iv) Al.`
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MODERN PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -CONCEPTUAL QUESTIONS
  1. Energy of an electron in the ground state of the hydrogen atom is -2.1...

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  2. The electron gain enthalpies of halogens are as given below: F =- 33...

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  3. Magnesium loses electrons successively to form Mg^(+),Mg^(2+)andMg^(3+...

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  4. Out of Na and Mg which has higher second ionisation energy?

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  5. Which is the smallest among Na^(o+),Mg^(2+),Al^(3+), and why?

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  6. Arrange the following in the order of increasing ionization potential

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  7. The electronic configuration for the following neutral atoms are given...

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  8. How would you explain the fact that the first ionisation enthalpy of s...

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  9. Among the second period elements the actual ionisation enthalpies are ...

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  10. Identify the best choice in the list: (i) Largest ionic size :Mg^(2+...

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  11. Arrange the following in the decreasing negative electron gain enthalp...

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  12. Which of the following has highest ionization energy

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  13. Arrange the following in the increasing order of the size . Cl^(-),...

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  14. A student reported the radii of Al ^(3+), Mg^(2+), and F ^(-) as 136 p...

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  15. Among the elements Li, K,Ca, S and Kr , which one is expected to have ...

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  16. The IE(1) and IE(2) (kJ mol^(-1)) of three elements A, B and C are giv...

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  17. Among the elements, B, Al, C and Si, a) which element has the highes...

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  18. Which of the following species has the smallest size? (a) K^(o+), Sr...

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  19. The first (IE1) and second (IE2) ionisation enthalpies ("kJ mol"^(-1))...

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  20. Which of the elements Na, Mg, Si and P have the greatest difference be...

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