Find ab if the coordinate of a is 5 and the coordinate if b is -5

14 days is the half-life of phosphorus-32

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.

idk what is it? is this a question that you know the answer or u dont