Embed Size (px)
DESCRIPTION
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. - PowerPoint PPT Presentation
Citation preview
4-3
ELECTRON CONFIGURATIONS
Beaker Breaker
1. An energy level of n=3 can hold how many electrons?
2. The second quantum number (Angular Momentum Quantum Number, l) for n=2 is_____________
3. 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
Relative Energies of Orbitals
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:
1. Na2. Al3. Cl4. 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.
PREDICTED
PreClass: Write the following notations for the element
chromium (Z = 24):
• Electron configuration
• Orbital notation
• Noble gas
ELEMENT ORBITAL
NOTATION
ELECTRON CONFIGURATION
NOTATION
Cr
Mn
Cu
Zn
jbechtel:
GO THRU Ca
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
Why can the 3rd energy level hold 18 electrons?
