ECE 644

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. B. the atom has 15 electrons. C. there are 7 ...