Cobalt Ions and Their Properties

The video tutorial explains the ionic charge of cobalt, highlighting that cobalt is neutral on the periodic table. It forms two main ions: cobalt 3+ and cobalt 2+, by losing electrons. The video discusses how these electrons are transferred to elements like chlorine, forming ionic compounds such as cobalt chloride. It also clarifies the difference between ionic charge and oxidation numbers, emphasizing the common ions formed by cobalt.

What is the charge of cobalt when it is in its neutral state on the periodic table?

• Variable

• Zero

• Negative

• Positive

How many electrons does cobalt lose to form a cobalt(III) ion?

• Two

• Three

• Four

• One

What is the ionic charge of a cobalt(II) ion?

• 4+

• 1+

• 2+

• 3+

When cobalt loses two electrons, which element can gain these electrons to form a compound?

• Nitrogen

• Hydrogen

• Chlorine

• Oxygen

How many chloride ions are needed to balance the charge of a cobalt(II) ion?

• Three

• One

• Two

• Four

For a cobalt(III) ion, how many chloride ions are required to achieve charge balance?

• Four

• One

• Two

• Three

What happens to electrons during the bonding process of cobalt ions?

• They are shared equally

• They remain unchanged

• They are lost by cobalt

• They are gained by cobalt

What is the difference between ionic charge and oxidation number?

• They are the same

• Ionic charge is always positive

• Oxidation number can vary

• Ionic charge is always negative

Which of the following statements is true about cobalt ions?

• Cobalt ions can only lose two electrons

• Cobalt ions can lose more than three electrons

• Cobalt ions never lose electrons

• Cobalt ions always gain electrons