are first half-filled before they are totally filled. F (9 electrons). 1s. 2s 2p. 3s 3p 3d. 4s 4p 4d 4f. 5s 5p 5d 5f 5g.
CONCEPT: ELECTRON CONFIGURATIONS In this chapter we will focus on how an element’s ________________________________________ - the distribution of electrons within the orbitals of its atoms – relates to its chemical and physical properties. History Lesson: In 1870, Dmitri Mendeleev arranged 65 elements into a ___________________________________ . •
He summarized their behavior in the _______________________________.
•
When arranged by atomic mass, the elements exhibit a periodic recurrence of similar properties.
The Electron Configuration According to the _______________ Principle you first have to totally fill in the lowest energy level before moving to the next.