Perbromate Ion and Valence Electrons

The video tutorial explains how to write the Lewis structure for the perbromate ion (BrO4-). It begins by calculating the total valence electrons, considering bromine and oxygen atoms, and the extra electron due to the negative charge. The tutorial then guides through placing bromine at the center, surrounding it with oxygen atoms, and forming chemical bonds. It ensures all atoms have complete octets and concludes by adding brackets and a negative sign to indicate the ion's charge.

How many total valence electrons are present in the perbromate ion, BrO4-?

• 34

• 32

• 30

• 28

Which element is placed at the center of the BrO4- ion structure?

• Oxygen

• Bromine

• Hydrogen

• Nitrogen

Why is bromine placed at the center of the BrO4- ion?

• It is the most electronegative element.

• It has the highest atomic number.

• It is the least electronegative element.

• It forms the most bonds.

How many valence electrons are used to form bonds between bromine and oxygen in BrO4-?

• 12

• 16

• 4

• 8

What is the total number of valence electrons used to complete the octets of the oxygen atoms in BrO4-?

• 40

• 32

• 24

• 16

What is added to the Lewis structure of BrO4- to indicate it is an ion?

• A double bond

• A single bond

• Brackets and a negative sign

• A positive sign

What is the charge of the perbromate ion?

• Positive

• Neutral

• Negative

• Double negative