Bellringer - calhoun.k12.al.us

Bellringer - calhoun.k12.al.us

Electron Configurations Objectives: 3.0 Use the periodic table to identify periodic trends, including atomic radii, ionization energy, electronegativity, and energy levels. 3.1 Utilizing electron configurations, Lewis dot structures, and orbital notations to write chemical formulas

Ground State Electron Configurations Electron configuration: the arrangement of electrons in an atom What is ground state? Three rules define how electrons are arranged in an atoms orbitals: 1. The aufbau principle 2. The Pauli exclusion principle

3. Hunds rule The Aufbau Principle Each electron occupies the lowest energy orbital available, according to the aufbau diagram: The Pauli Exclusion Principle A maximum of 2 electrons may occupy a single atomic orbital, but ONLY if the

electrons have opposite spins (represented by and ). Hunds Rule Single electrons with the same spin must occupy each equal-energy orbital before additional electrons with opposite spins can occupy the same orbitals (i.e., 1 in each 3p orbital BEFORE a can pair up with a in an orbital).

Orbital Diagrams and Electron Configuration Notations These are just 2 different ways to represent an atoms electron configuration. Orbital Diagrams: Have a box for each of the atoms orbitals. Boxes contain either (1 electron), or

(full orbital), or may be empty. Each box is labeled with the principal quantum number and the sublevel associated with the orbital. Examples on board Electron Configuration Notation Shorthand to designate all electrons and their orbitals Designates principal energy level and

sublevel, and includes a superscript to show the number of electrons in the orbital. Example: Carbon 1s22s22p2 What is the electron diagram for carbon? Table 5-3, p.137 Electron Configuration Notation (cont.) What is the electron configuration notation for the following elements?

a. b. c. d. e. f. Helium Neon Argon

Krypton Xenon Radon What do these elements have in common? Electron Configuration Notation (cont.) Electron configuration notation can be

abbreviated by noble-gas notation. [He] = 1s2 [Ne] = 1s22s22p6 So magnesium can be written: 1s22s22p63s2 -OR [Ne]3s2 How would you write phosphorous?

Recently Viewed Presentations

  • Day 01 - Lesson 4

    Day 01 - Lesson 4

    The building blocks of an O-O program A program that uses O-O is basically a collection of objects Objects interact much like things in the real world do 6/16/09 Python Mini-Course: Lesson 25 * What is an object? ... A...
  • MAGI - North Carolina

    MAGI - North Carolina

    MAGI. Modified Adjusted Gross Income Methodology. This will be used to determine how income is counted and how household composition and a family size is constructed when determining eligibility for Medicaid/NCHC. For Medicaid purposes, the applicant's countable income will be...
  • Choosing courses and universities

    Choosing courses and universities

    www.independentjobs.independent.co.uk HANDY TIP!! You can write a speculative letter (a letter to a company who is not advertising any jobs), you never know they may have some that they have not advertised yet.
  • Claves Para Comprender La Infamia Del Tratado De Lisboa I

    Claves Para Comprender La Infamia Del Tratado De Lisboa I

    el proyecto matriz # 112 ¿permanecerÁs impasible? comparte tu conocimiento el fin del letargo el proyecto matriz "es detestable esa avaricia espiritual que tienen los que, sabiendo algo, no procuran la transmisión de esos conocimientos" miguel de unamuno * canciÓn...
  • Accreditation Snap Shot An Accreditation Update to the

    Accreditation Snap Shot An Accreditation Update to the

    2009 Recommendations from ACCJC. Integrated Planning, QEIs, Long-Term Resource Allocation. Data Reliability, Access, Training. Assessment of SLOs. Evaluation of Administrative and Governance Functions
  • Unit: The Era of Jackson MYP Unit Question:

    Unit: The Era of Jackson MYP Unit Question:

    Was it really a "Corrupt Bargain"? Monday: What compromise combined the Virginia and New Jersey Plans to create the two houses of Congress? Was the election of 1824 rigged? John Quincy Adams, Andrew Jackson, Henry Clay. 2. No one had...
  • Vocabulary Week of 3/25 - 3/29 - TIRE DEALERS

    Vocabulary Week of 3/25 - 3/29 - TIRE DEALERS

    Vocabulary Week of 3/25 - 3/29. Goal: to learn a new word, its part of speech, and to use it correctly in an original sentence.
  • ExCel - HCC Learning Web

    ExCel - HCC Learning Web

    Entering and Leaving Excel. Study Figures 2.1 and 2.2 and 2.3. Be able to label the parts of an Excel worksheet for the exam. Study the vocabulary words that are in italics. Several ways to leave Excel: from the File...