AP Chem Lesson - Electron configuration

Electron configuration
Noble gas configuration
Valence electrons
Lewis Dot diagrams

Fill in the Blank

A way that scientists describe the location of the electrons in an atom

Multiple Choice

 Electrons are located outside the nucleus in ________________.

• sublevels

• orbitals

• shells

​The electrons arrange themselves in orbitals that can be predicted by a complicated mathematical equation called the Schrodinger equation.  The Schrodinger equation solution provides us with sets of four numbers that describe 4 features of the probable location of each electron.  Those features are: 

• how far away from the nucleus the electrons are most likely to be found

• the shape of the orbital that the electrons are traveling within 

• the orientation that the orbital has  (on the x, y or z axis or a combination)

• the “spin” of the electrons in the orbital
  The set of 4 numbers are called _________ __________.

Fill in the Blank

The 4 numbers are called ________________.

Multiple Choice

Principle Quantum Number, indicated by the letter "n" and is numbers 1, 2, 3, 4,____ corresponds to the ______ on the periodic table and state the ____________________ the electrons are located.

• columns, energy level

• rows, orbitals

• rows, energy levels

Multiple Choice

Angular Quantum Number, indicated by the letter "l" (lower case L) , indicates the ____________ of the orbital and are give letter s, p, d , f

• orbital

• energy level

• shape

• number

Multiple Choice

Spin Quantum Number, m_s is indicate by _________.

• lines

• circles

• arrows

• crosses

Match

How many electrons are contain within each orbital ?

• s

• p

• d

• f

2

5

10

14

• 2

• 5

• 10

• 14

Match

Match the following

• Electrons fill the lowest energy orbitals first

•  Electrons are placed into equivalent orbitals individually (with parallel spins) before they are paired.  

  
  

• No two electrons can have the same 4 quantum numbers

Aufbau diagram

Hund’s Rule

Pauli Exclusion Principle

• Aufbau diagram

• Hund’s Rule

• Pauli Exclusion Principle

Match

Match the following

Which group fill the given orbital?

• s

• p

• d

• f

Group 1 & 2

(plus He)

Group 13 - 18

Group 3 - 12

lanthanide and actinide series

• Group 1 & 2

  (plus He)

• Group 13 - 18

• Group 3 - 12

• lanthanide and actinide series

Fill in the Blank

Write the electron configuration for Chlorine.

Place a space between each and do not try to exponent

example: 1s2 2s2

​Write the electron configuration then orbital filling diagram for Titanium

Fill in the Blank

1. Given the following ground state electron configurations, determine the element represented.  

1s2 2s2 2p6 3s2 3p6 4s2 3d5

Fill in the Blank

 1s2 2s2 2p6 3s2 3p6 4s1

Multiple Choice

There is a short-cut to writing an electron configuration, the noble gas or short-cut electron configuration called ___________-

• king configuration

• priest configuration

• noble gas configuration

• easy configuration

Multiple Choice

Noble gases are in group ___ or ____ of the periodic table and they are considered inert which means that they are _____________, they do not lose or gain electrons readily.  

• 8A, 18, unreactive

• 8B, 18, unreactive

• 8A, 18, very reactive

• 8B, 18, very reactive

Fill in the Blank

 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2

Fill in the Blank

Write the noble-gas electron configuration for Niobium, Nb #41?

[

]

Fill in the Blank

Write the noble-gas electron configuration for titanium, Ti #22. 

[

]

​Valence Electrons are the electrons in the outer shells.  They determine how a substance reacts and how it forms bonds with other substances.  They are the electrons in the highest energy level, the ones with the largest n value.

Match

Match the following

number of valence electron with group number

• 1

• 2

• 8

1

2

18

16

• 1

• 2

• 18

• 16

​We can draw a Lewis Dot diagram to represent the valence electrons, we will use these more when we get into bonding.

Poll

Where is your comfort level electron configuration, noble gas configuration, valence electrons and Lewis Dot diagram?

• Awesome!

• Ok!

• Still have a few question??

• Lost :(