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4-3. ELECTRON CONFIGURATIONS. Beaker Breaker. An energy level of n=3 can hold how many electrons? The second quantum number ( Angular Momentum Quantum Number, l) for n=2 is_____________ The letter denotation (shapes) for n =2 is?. Hund’s Rule.
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4-3 ELECTRON CONFIGURATIONS
Beaker Breaker • An energy level of n=3 can hold how many electrons? • The second quantum number (Angular Momentum Quantum Number, l) for n=2 is_____________ • The letter denotation (shapes) for n =2 is?
Hund’s Rule • Orbitals of equal energy are each occupied by one electron before any orbital is occupied by a second electron, and… • All electrons in singly occupied orbitals must have the same spin
Order of increasing energy for each orbital p. 105 and 110)
Aufbau Principle • An electron occupies the lowest-energy orbital that can receive it
Beaker Breaker • Write the orbital notation of Oxygen (O) • Write the orbital notation of Ti
Noble Gas Notation • What is the noble gas configuration for calcium? • 1s22s22p63s23p64s2 • [Ar]4s2 • What is the noble gas config for S? • 1s22s22p63s23p4 • [Ne]3s2 3p4
Beaker Partner Practice Problems • The electron configuration of fluorine is 1s22s22p5 What is the atomic number of fluorine? How many of its p orbitals are filled? How many unpaired electrons does a fluorine atom contain? • Write the electron configuration, noble gas configuration and orbital notation for: • Na • Al • Cl • P
Beaker Breaker Problem Complete the electron configuration and noble-gas configuration only of chlorine (Cl) Open books to page 110 please
Objective • Describe the electron configurations for the atoms of any element using oribital notation, electron-configuration notation and when appropriate, noble-gas notation.
Beaker Partner Activity • Complete the electron configuration and noble gas configuration only of the following elements • Cadmium (Cd) • Tin (Sn)
Objective • Describe the electron configurations for the atoms of any element using oribital notation, electron-configuration notation and when appropriate, noble-gas notation.
PreClass: Write the following notations for the element chromium (Z = 24): • Electron configuration • Orbital notation • Noble gas
jbechtel: GO THRU Ca
Beaker BreakerWrite the following notations for the element nickel (Z=28): • Orbital notation • Electron configuration • Noble gas
PreClass: Write the following notations for the element bismuth (Z = 83): • Electron configuration • Orbital notation • Noble gas