Mercury(II) Iodide and Iodine Concepts

This video tutorial explains how to write the chemical formula for Mercury(II) Iodide. It begins by identifying mercury as a transition metal with a 2+ charge and iodide with a 1- charge. The video then demonstrates how to balance these charges to form a neutral compound, resulting in the formula HgI2. The tutorial concludes with a summary of the process and the final formula.

What does the Roman numeral II indicate in the name mercury(II) iodide?

• The atomic number of mercury

• The number of iodide ions

• The number of mercury atoms

• The charge of the mercury ion

Which group on the periodic table does iodine belong to?

• Halogens

• Transition metals

• Alkali metals

• Noble gases

What is the typical ionic charge of iodine when it forms an ion?

• 2-

• 1+

• 2+

• 1-

Why do the charges in mercury(II) iodide need to add up to zero?

• To form a stable ion

• To create a neutral compound

• To balance the equation

• To increase reactivity

How many iodide ions are needed to balance the charge of one mercury ion in mercury(II) iodide?

• One

• Two

• Three

• Four

What is the chemical formula for mercury(II) iodide?

• Hg2I2

• HgI2

• Hg2I

• HgI