Write the correct formula for the compound formed between beryllium and nirtrogen

Use the periodic table to complete this equation that represents nuclear fission processesun - ba c 3 n

Which of these is an intensive property of a substance

Need what is special about water as a compound? how does water regulate climate? what drives water evaporation?   why is the water vapor fresh water when it rises from the ocean? why might freshwater in the form of snow take longer to enter the water cycle again than liquid precipitation?   what is an aquifer? what role do people play in the water cycle? plz just answer as many as you can ! thx if you !