Valence Electrons and Expanded Octets

This video tutorial explains how to draw the Lewis structure for BrF4+. It begins by counting the valence electrons for bromine and fluorine, considering the positive charge. The tutorial then guides through placing bromine at the center and arranging fluorine atoms around it. It explains forming chemical bonds and completing the octet for each fluorine atom. The video also covers the concept of expanded octets, allowing bromine to have more than eight electrons. Finally, the completed Lewis structure for BrF4+ is presented.

How many total valence electrons are there in BrF4+?

• 36

• 34

• 32

• 38

Which atom is placed at the center of the BrF4+ Lewis structure?

• Oxygen

• Fluorine

• Bromine

• Hydrogen

How many valence electrons are used to form bonds between bromine and fluorine atoms?

• 10

• 4

• 6

• 8

What is the total number of valence electrons used to complete the octet for all fluorine atoms?

• 36

• 32

• 28

• 24

What is an expanded octet?

• An octet with 8 electrons

• An octet with exactly 10 electrons

• An octet with more than 8 electrons

• An octet with less than 8 electrons

How many valence electrons does bromine have in the final structure of BrF4+?

• 11

• 10

• 9

• 8

Why is bromine allowed to have an expanded octet?

• It is in period 2

• It is in period 3 or higher

• It is a noble gas

• It is highly electronegative

What is the charge on the BrF4+ ion?

• +2

• -1

• +1

• 0

What is the significance of the positive charge in BrF4+?

• It indicates a double bond

• It indicates a gain of electrons

• It indicates a loss of electrons

• It indicates a neutral charge