Para identificar tres liquidos de densidade 0,8, 1,0 e 1,2, o analista dispoe de uma pequena bola de densidade 1,0. Conforme as posições das bolas representadas no desenho a seguir, podemos afirmar

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.