What is the total number of protons in an atom with the electron configuration 2-8-18-32-18-1?
(1) 69 (3) 118
(2) 79 (4) 197

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car