Why does Fluorine, with fewer protons in its nucleus, have a higher ionization energy than its fellow period 1 element Lithium? use atomic size, inner electrons & effective charge in your answer.

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?