51. An element with electronic configuration 2, 8, 8, belongs to . . . . . . . . group in the modern periodic table
52. Which of the following elements is more electronegative?
53. The electronic configuration of an element is 2, 8, 3. this . . . . . . . . Belongs to the group.
54. The group that shows the correct order of the first ionisation potential is:
55. Which of the following is the third member of the Dobereiner's triad, which also includes lithium and sodium?
56. Which group of modern periodic table contains complete valence shells and chemically inert elements?
57. In the modern periodic table, elements with atomic numbers 58 to 71 are called-
58. Which of the following elements has maximum atomic radius?
59. Which one of the following is not a periodic property i.e., does not show any trend on moving from one side to the other in the Periodic Table?
60. What are the horizontal rows in a periodic table called?
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