If an atom has has a mass of 18 and an atomic number of 8, how many protons are present

What is the social order of the ancient river valley civilization of mesopotamia?

Which of the following was not a result of early humans increasing proficiency at finding food

For each of the following examples of data, determine which scale of measurement is used. a) the number of miles joggers run per week. b) the starting salaries of graduates of mba programs c) the months in which a firm's employees choose to take their vacations. d) the final letter grades received by students in a math course.