The Molecules of Cells Multiple Choice Questions 1. If an element has an atomic number of 12, how many electrons are in its outermost shell? A. 1 B. 10 C. 8 D. 2 E. 12 Two electrons fill the innermost shell and eight fill the next, leaving two for the outermost shell. Bloom's Level: Apply Figure: 2.06 Learning Outcome: 2.01.02 Section: 2.01 Topic: Chemistry 2-1 Full file at 2. If an element has an atomic number of 15, then A. the atomic mass must also be 15. ...