A good experimental design should always: A.) have predictable outcomes
B.) be repeatable
C.) include more than one independent variable
D.)more than one of these

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

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.

i think is conclusions.i think so