The set of lettered choices below refers to multiple questions. Select the one lettered choice that best fits each statement or answers each question. A choice may be used once, more than once, or not at all in each set.
Has electrons in orbitals
Select an Answer
The element with the lowest atomic number that has any electrons in an orbital is cerium (atomic number ), which has the electron configuration . All elements with an atomic number equal to or greater than have ground-state atoms with electrons in orbitals. Uranium has an atomic number of ; therefore the correct answer is (E).