Which one of the metal atoms whose electronic structure given below forms a nitrate of the type M(NO3)2? 37 A. 2.8.0 B. 2.8.1 C. 2.8.2 D. 2.8.3 38. Which one of the following atomic number will indicate the least reactive element? A. 2.8.1 B. 2.8.2 C. 2.8.7 D. 2.8.8 The element M belong to group IV in the Periodic Table. The formula of the oxide of metal M is 39. A. B. MO4 M40 40 40 C. MO2 D M304 The table below shows the number of protons, electrons and neutrons of atom R, S, TU and V. Use it to answer questions 40 to 43. Atom No. of protons No. of electrons No. of neutrons R 11 11 S 17 17 T 18 18 U 19 19 V 17 17 Which of the above atoms are isotopes A. R and S B. S and T C. U and V 12 18 22 20 20 D. S and V Which atoms form positive ions of the same charge? 41. A. R and S B. R and U C. U and V D. S and V