我先來
km, section a: empirical formula( precautions,draw apparatus, observation,calculation), periodic table, carbon compound(alkane,alkene,alcohol) , salt, redox (electrolysis), soap and detergent( hw to make soap,adv and disadv ) , contact ,haber process, thermochem.. secB,: hw to make soluble,insoluble salt, rate of reaction( catalyst, s.area, concentration) , bond( ionic, covalent) , alloy