CHM 2045 - CH7 CLUTCH PREP.pdf

CHM 2045 - CH7 CLUTCH PREP.pdf - CHEMISTRY KOTZ 9E CH.7 THE...

This preview shows page 1 - 8 out of 36 pages.

CHEMISTRY - KOTZ 9E CH.7 - THE STRUCTURE OF ATOMS & PERIODIC TRENDS
Image of page 1

Subscribe to view the full document.

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. 1s 2s 2p 1s 2s 2p Hund’s Rule states that electron orbitals that are _______________________ 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 6s 6p 6d 6f 6g 6h 7s 7p 7d 7f 7g 7h CHEMISTRY - KOTZ 9E CH.7 - THE STRUCTURE OF ATOMS & PERIODIC TRENDS Page 2
Image of page 2
CONCEPT: CONDENSED ELECTRON CONFIGURATION EXAMPLE: Write the condensed configuration for each of the following elements: a. Co (27 electrons) b. Se (34 electrons) PRACTICE: Write the condensed configuration for each of the following elements: a. Ag (47 electrons) CHEMISTRY - KOTZ 9E CH.7 - THE STRUCTURE OF ATOMS & PERIODIC TRENDS Page 3
Image of page 3

Subscribe to view the full document.

CONCEPT: INNER CORE & VALENCE ELECTRONS EXAMPLE: How many core (inner) and valence electrons are present in each of the following elements? a. P b. Al c. Mn CHEMISTRY - KOTZ 9E CH.7 - THE STRUCTURE OF ATOMS & PERIODIC TRENDS Page 4
Image of page 4
CONCEPT: PARAMAGNETISM Vs. DIAMAGNETISM EXAMPLE: Write the condensed electron configuration of each ion and state if the ion is paramagnetic or diamagnetic . a. Ni 3+ b. S 2- PRACTICE: Write the condensed electron configuration of each ion and state if the ion is paramagnetic or diamagnetic . a. Cu + CHEMISTRY - KOTZ 9E CH.7 - THE STRUCTURE OF ATOMS & PERIODIC TRENDS Page 5
Image of page 5

Subscribe to view the full document.

CONCEPT: THE FOURTH QUANTUM NUMBER An electron in an atom is described completely by a set of four quantum numbers. The first three describe its ____________________ and the fourth describes its ________________ . The ____________ quantum number (m S ) helps to discuss the rotational spin of the electron and has values of either _________ and _________ . According to the _________________________________: no two electrons in the same atom can have the same four quantum numbers. EXAMPLE: State the electron configuration of boron and list the four quantum numbers of the 1 st and the 5 th electron. CHEMISTRY - KOTZ 9E CH.7 - THE STRUCTURE OF ATOMS & PERIODIC TRENDS Page 6
Image of page 6
CONCEPT: ATOMIC ORBITAL SHAPE The _______________________ quantum number deals with the shape of the atomic orbital. Each atomic orbital has a specific shape. It uses the variable ___________ and formula _______________________. Each atomic sub-level has an L value associated with it. Sublevel s p d f g L value 0 1 2 3 4
Image of page 7

Subscribe to view the full document.

Image of page 8
You've reached the end of this preview.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern