Valence Electrons and Lewis Structures

The video explains the Lewis structure of TEF4, focusing on the arrangement of tellurium and fluorine atoms. It details the use of 34 valence electrons to form chemical bonds, ensuring each atom achieves an octet. The video also discusses the concept of an expanded octet for tellurium, as it is below period 2 on the periodic table. The tutorial concludes with a confirmation that all valence electrons are used, and the structure is correct.

Which group does tellurium belong to on the periodic table?

• Group 10

• Group 8

• Group 6

• Group 4

How many valence electrons does fluorine have?

• 8

• 7

• 6

• 5

What is the total number of valence electrons in TEF4?

• 28

• 30

• 32

• 34

Where is tellurium placed in the Lewis structure of TEF4?

• At the top

• At the bottom

• In the center

• On the side

What is the significance of the remaining pair of electrons in TEF4?

• They are placed on the central tellurium atom

• They are removed from the structure

• They are shared with another molecule

• They are given to fluorine atoms

Why can tellurium have more than 8 valence electrons in TEF4?

• It is below period 2

• It is in period 3

• It is in period 2

• It is in period 1