1- 1) Iron metal is magnetic. 2) Copper conducts electricity. 3) The mass of the NaCl sample is 30 grams. 4) Gold is nonflammable 5)Diamond is a very hard substance. I should identify the following properties physical or chemical but I could not decide 2- - Formation of snow - cooking - condensation of rain - nuclear fission - photosynthesis which ones are exothermic reactions and do their temperature rises/falls?