44. Which statement below is TRUE? A. Xenon (Xe) is more reactive than Radon (Rn). B. Xenon (Xe) is more reactive than Krypton (Kr). C. Xenon (Xe) is less reactive than Radon (Rn). D. Xenon (Xe) is less reactive than Krypton (Kr) 45. has higher metallic property than Strontium (Sr). A. Nb (Niobium) B. Rb (Rubidium) C. Y (Yttr 46. The rows in the periodic table is called A. column B. family C. peric 47. Periodic law states that "the properties of elements vary periodica A. atomic weight B. atomic number C. period 48. When the arrow goes down in the periodic table, what happens to A. The reactivity of metallic elements increases. B. The reactivity of metallic elements decreases. C. The reactivity of metallic elements will not change. D. The reactivity of metallic elements cannot be determined. 49 Metals have the largest -​