A substance with a pH of 5 is a:

a. weak base
b. strong base
c. weak acid
d. strong acid

indium, and thallium have three electrons i think

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.

the answer is c.the valence of the atoms combine .

the answer is 0.42 is that is an option. this question provides no info