31. . . . . . . . . has the largest electron affinity?
32. Which of the first element on the Periodic Table?
33. What are the commonly known elements F, Cl, Br, I and At?
34. In a periodic table, while moving from left to right in a period, number of remains same.
35. Electronegativity is the measure of the . . . . . . . . of an atom.
36. Elements in the same group is Similar in
37. . . . . . . . . melting point is very low.
38. The element that has the highest electron affinity in the third period is that . . . . . . . . is.
39. Alkaline metals are placed in which group in the modern periodic table?
40. According to Newlands' law of octaves, how many elements exist in nature?
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