Iodine Chemistry Concepts

The video tutorial explains the chemical formula of iodine, highlighting its diatomic nature as I2 in solid, gas, and liquid forms. It delves into the Lewis structure of iodine, showing its valence electrons and stable octet. The tutorial also covers the iodide ion (I-), its formation, and behavior in ionic compounds like sodium iodide. The video concludes with a recap of iodine's properties and its behavior in aqueous solutions.

What is the chemical formula for iodine when it is not bonded to any other element?

• I-

• I

• I2

• I3

Why is iodine considered a diatomic molecule?

• It forms a single atom

• It consists of two atoms

• It is a monatomic ion

• It bonds with three atoms

How many valence electrons does each iodine atom have in its Lewis structure?

• 7

• 6

• 5

• 8

What type of bond is present between the iodine atoms in I2?

• Metallic bond

• Covalent bond

• Hydrogen bond

• Ionic bond

What is the charge of the iodide ion?

• 2-

• 1-

• 2+

• 1+

How does the iodide ion differ from a single iodine atom?

• It has a positive charge

• It has an extra electron

• It has more protons

• It has fewer electrons

What happens to sodium iodide when it is dissolved in water?

• It forms a solid

• It remains unchanged

• It splits into ions

• It evaporates

What is the ionic charge of sodium in sodium iodide?

• 1-

• 2-

• 1+

• 2+

What happens to sodium iodide when water evaporates?

• It becomes a liquid

• It remains dissolved

• It forms a gas

• It reforms as a solid

What is the chemical formula for the iodide ion?

• I

• I-

• I2

• I3