A simple, four-step method for better introducing undergraduate students to the fundamentals of molecular orbital (MO) theory of the polyatomic molecules H2O, NH3, BH3 and SiH4 using group theory is ...

Two hundred and eighty-six days into its mission, the Mars Surveyor ’98 began its orbital insertion maneuver — and 20 minutes later the spacecraft was permanently lost. When the Mishap Investigation ...