a) How many protons, neutrons and electrons are there in 52 24Cr 6+? b) Give the electron configuration of 14 Si and list the quantum numbers of the two highest energy electrons. c) In acidic medium balance the following equation: As2O3 + MnO4 H3AsO4 + Mn2+ d) Give the Lewis electron structure of chloroform (CHC13) molecule and define the molecular structure by VSEPR method. (1701)