Write Either A or B A. Explain VSEPR Theory with an example (H2O or NH3) to predict the shapes of these molecules? How do electron geometry and Molecular geometry differ?

B. Write a short note on Valence Bond Theory. How sigma and pi bonds formed?

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?