Cobalt Nitrate and Nitrate Ions

The video tutorial explains how to write the Lewis structure for cobalt 2 nitrate (Co(NO3)2). It begins by introducing cobalt as a metal and nitrate as a polyatomic ion. The tutorial details the electron transfer process in ionic compounds, highlighting the charges of cobalt and nitrate. It then guides viewers through constructing the Lewis structure, including the use of brackets around ions. The video concludes by discussing the concept of formula units in crystals.

What type of ion is nitrate considered to be?

• Cation

• Anion

• Polyatomic ion

• Monatomic ion

How many nitrate ions are present in cobalt(II) nitrate?

• One

• Two

• Three

• Four

In an ionic compound, what happens to the electrons?

• They are shared equally between atoms.

• They are transferred from nonmetals to metals.

• They are transferred from metals to nonmetals.

• They remain with the metal atoms.

What is the charge of cobalt in cobalt(II) nitrate?

• 1+

• 2+

• 1-

• 2-

What is the charge of the nitrate ion?

• 1+

• 2+

• 1-

• 2-

What is the significance of the Roman numeral in cobalt(II) nitrate?

• It indicates the number of nitrate ions.

• It denotes the number of atoms in the compound.

• It shows the oxidation state of cobalt.

• It represents the number of electrons in cobalt.

Why do we use brackets in the Lewis structure of cobalt(II) nitrate?

• To highlight the crystal structure

• To separate the metal from the nonmetals

• To show the charge of the ions

• To indicate the presence of a polyatomic ion

What does the term 'formula unit' refer to in the context of ionic compounds?

• A single atom of the compound

• A single molecule of the compound

• The total number of ions in the compound

• The smallest repeating unit in a crystal

What is the overall charge of the cobalt(II) nitrate compound?

• Neutral

• Variable

• Negative

• Positive