The size of an atom generally increases down a group and from right to left across a period. up a group and from left to right across a period. down a group and from left to right across a period up a group and from right to left across a period. up a group and diagonally across the Periodic Table. Which set shows the correct resonance structures for SeO_2? SeO_2 does not have a resonance structure. Which of the following ions doesn't have the same electronic configuration noble gas? Cl_- N^3+ S^2- So^3+ None of the above The bond length of 1.27 Angstrom, what is the dipole moment in debayes, if the charges on H and Cl were +1 and -, respectively? 4.79 D 1.63 D 6.08 D 1.08 D None of the above What is the estimation of the delta H (Bond dissociation energy change) for the following gas phase reaction? CHBr_2 + Cl_2 rightarrow CBr_3Cl + HCl D(C-H) = 413kj, D(Cl-Cl) = 242 kJ, D(C-Cl) = 328 kJ, D(H-Cl) = 43kJ.