Modern periodic law and periodicity in properties - Question Bank
1. Which of the following elements would have the most positive electron gain enthalpy?
2. The highest ionization enthalpy for the second period elements is observed for:
3. Which of the following is a consequence of the lanthanide contraction?
4. Which of the following elements has the largest atomic radius?
5. The element with the electronic configuration $[Kr] 4d^{10} 5s^2$ belongs to:
6. Which of the following is a characteristic property of transition metals?
7. The ionization enthalpies of transition metals show:
8. Which property is most affected by the shielding of d-electrons in transition metals?
9. The trend in the basicity of oxides down a group is:
10. The trend in the basicity of oxides across a period is:
11. Which of the following oxides is amphoteric?
12. The element that exhibits the highest oxidation state is:
13. The element that is diamagnetic in its common oxidation state is:
14. Which of the following pairs of elements have similar chemical properties?
15. The element with electronic configuration $[Ar] 3d^5 4s^1$ belongs to:
16. Which of the following statements about periodic trends is INCORRECT?
17. The ionic radius of $F^-$ is larger than that of $O^{2-}$ because:
18. Which of the following ions is isoelectronic with Neon ($Ne^{10+}$)?
19. The ionization enthalpy generally increases across a period. Which element is an exception to this trend and has a lower value than the preceding element?
20. The atomic radii of the elements in the second period show a general decrease from Li to Ne. Which pair of elements deviates from this trend?
21. The deviation from the expected trend in electron gain enthalpy for elements like Nitrogen is due to:
22. Which of the following is an exception to the general trend in ionization enthalpy across a period?
23. The element with the electronic configuration $1s^2 2s^2 2p^6 3s^2 3p^6 3d^{10} 4s^2 4p^5$ belongs to which group?
24. The element with the electronic configuration $1s^2 2s^2 2p^6 3s^2 3p^6 4s^1$ belongs to which group?
25. Lanthanides and actinides are collectively known as:
26. Which of the following elements exhibits the most pronounced metallic character?
27. The blocking of d-orbitals in transition metals affects which property significantly?
28. Noble gases (Group 18) are characterized by:
29. The halogens (Group 17) are characterized by:
30. The alkali metals (Group 1) are characterized by:
31. Which of the following is a metalloid?
32. Oxidation state refers to the hypothetical charge that an atom would have if:
33. Non-metallic character generally increases down a group because:
34. Metallic character generally decreases across a period because:
35. Elements with a negative electron gain enthalpy tend to:
36. Which element has the most negative electron gain enthalpy?
37. Electron gain enthalpy is the energy change when an electron is added to:
38. Which element is the least electronegative among halogens?
39. Which element is the most electronegative?
40. Electronegativity is the tendency of an atom to attract:
41. Down a group, atomic radius increases primarily because of:
42. Atomic radius generally decreases across a period due to:
43. Which element has the lowest first ionization enthalpy?
44. Which element has the highest first ionization enthalpy?
45. The first ionization enthalpy is the energy required to remove the most loosely bound electron from:
46. Which property generally increases down a group in the periodic table?
47. Which of the following properties generally decreases across a period from left to right?
48. Groups in the modern periodic table represent elements with the same:
49. In the modern periodic table, periods correspond to:
50. The modern periodic law states that the physical and chemical properties of elements are periodic functions of their: