Which of the following gases will have the slowest rate of effusion?

water vapor (m = 18 g/mol)
oxygen gas (m = 32 g/mol)
hydrogen gas (m = 2.0 g/mol)
carbon dioxide (m = 44 g/mol)

An atom holds 7 electrons. use orbital notation to model the probable location of its electrons. an atom hold 22 electrons. use orbital notation to model the probable location of its electrons. an atom holds 17 electrons. use orbital notation to model the probable location of its electrons.