This video tutorial covers the naming of ionic compounds, starting with a review of ionic bonds and the stability of elements in compounds. It introduces the crisscross method for determining chemical formulas and explains how to name compounds using this method. The tutorial also addresses exceptions, such as polyatomic ions and transition metals, and provides practice exercises to reinforce learning.

What is the primary reason elements form compounds?

• To increase their mass

• To become more stable

• To change their color

• To decrease their volume

Which type of bond involves the transfer of electrons from a metal to a nonmetal?

• Metallic bond

• Ionic bond

• Covalent bond

• Hydrogen bond

Tags

NGSS.HS-PS1-1

What is the first step in determining the chemical formula of an ionic compound using the crisscross applesauce method?

• Balance the chemical equation

• Draw the electron dot diagram

• Determine the molecular weight

• Write down the ions with their charges

In the crisscross applesauce method, what do you do after writing down the ions with their charges?

• Add the charges together

• Subtract the charges

• Multiply the charges

• Crisscross the charges to become subscripts

Which of the following is a polyatomic ion?

• O2-

• NH4+

• Cl-

• Na+

What is the correct name for the compound with the formula Na3PO4?

• Sodium peroxide

• Sodium phosphorous oxide

• Sodium phosphate

• Sodium phosphide

Why do transition metals require Roman numerals in their names?

• They are always positively charged

• They have variable charges

• They do not form compounds

• They are always negatively charged

What is the correct name for the compound CuCl2?

• Copper dichloride

• Copper(II) chloride

• Copper(I) chloride

• Copper chloride

How do you determine the charge of a transition metal in a compound?

• By using the crisscross method

• By looking at the periodic table

• By guessing

• By measuring the mass

What should you always remember to do when dealing with polyatomic ions in chemical formulas?

• Change their subscripts

• Put them in parentheses

• Ignore their charges

• Add extra electrons