Nickel(II) Iodide Ionic Compounds

The video tutorial explains how to write the formula for nickel 2 iodide. It begins by identifying the element symbols for nickel and iodide, then discusses the nature of ionic compounds and the importance of charge neutrality. The tutorial introduces the crisscross method to determine the correct formula and verifies the result by checking the charges. The final formula for nickel 2 iodide is confirmed as Ni2.

What are the element symbols for nickel and iodide?

• N and Id

• Ni and I

• N and I

• Ni and Id

Why is Nickel(II) Iodide considered an ionic compound?

• Because it is made of a metal and a metalloid

• Because it is made of two metals

• Because it is made of a metal and a non-metal

• Because it is made of two non-metals

What is the charge on nickel in Nickel(II) Iodide?

• 1+

• 2+

• 1-

• 2-

What is the ionic charge of iodine in Nickel(II) Iodide?

• 1-

• 2+

• 2-

• 1+

Which method is used to determine the formula for Nickel(II) Iodide?

• Cross-multiplication method

• Crisscross method

• Substitution method

• Balancing method

How do the charges in Nickel(II) Iodide add up to ensure neutrality?

• 2+ and 2-

• 1+ and 1-

• 2+ and 1-

• 1+ and 2-

What is the final formula for Nickel(II) Iodide?

• Ni2I

• Ni2I2

• NiI2

• NiI