Lecture one: 1. Naturally occurring chlorine is 75.78%35Cl (atomic mass 34.969amu ) and 24.22%37Cl (atomic mass 36.966amu ). The mass spectrum of Cl2 consists of three peaks. (a) Predict the mass of each peak (round to one decimal place). (b) Predict the relative size of the three peaks. 2. (a) Low-spin mononuclear Mn (II) in an octahedral coordination environment has one unpaired electron. Do you expect to observe an EPR signal for low-spin octahedral Mn(II) complexes? If yes, use the equation 2nl+1 to predict how many transitions do you expect to observe, and predict the splitting pattern? (Hint: 55Mn has a relative abundance of 100%. So please search the nuclear spin I for this nucleus) (b) Mononuclear Ni(II) in a square planar coordination environment has no unpaired electron. Do you expect such complexes to be EPR-active? If yes, use the equation 2nl+1 to predict how many transitions do you expect to observe, and predict the splitting pattern? (c) What product is formed when radium-226 undergoes alpha decay? (b) Write nuclear equations for mercury-201 undergoing electron capture. (c) Write nuclear equations for fluorine-18 undergoing positron emission. Lecture Two: 1. Write down the ground state electronic configuration of boron, and give a set of four quantum numbers (n,1,m1,ms) that uniquely define each electron. 2. Identify the number of unpaired electrons, core electron, valence electrons for a) nitrogen; b) chlorine; c) silicon. 3. Which of following represent impossible combination of n and I ? a) 1p; b) 4s; c) 5f 4. Which of the following is a valid set of four quantum numbers (n,1,m1,ms) ? For invalid set, please explain what went wrong. (A) 2,2,1,1/2 (B) 2,1,0,+1/2 (C) 2,1,+2,+1/2 (D) 1,0,1,+1/2 (E) 1,1,0,1/2 5. Identify elements with an electron configuration of a) [Ar]4s13d5;b)1s22s22p4