If an atom has 7 protons, 8 neutrons and 9 electrons, what is the mass number?

Aphysical reaction is a process in which one or more reactants change into one or more products with different properties. select the best answer from the choices provided t f

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize

Ab c or d ? i’m not sure what the answer is