How is the periodic table organized?

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

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?

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions