Understanding Ionic Compounds

The video tutorial explains how to name ionic compounds, using magnesium phosphide as an example. It covers the conventions of writing cations and anions, the ionization of magnesium and phosphorus, and how to balance charges to ensure neutrality. The tutorial concludes with naming the compound based on its constituent ions.

What is the first step in naming an ionic compound?

• Identify the cation

• Find the molecular weight

• Identify the anion

• Determine the net charge

Why is magnesium likely to be a cation?

• It is a non-metal

• It gains electrons

• It is a noble gas

• It loses electrons

What charge does magnesium typically have when it ionizes?

• 1+

• 2+

• 3+

• 0

What is the charge of phosphorus when it becomes an anion?

• 4-

• 3-

• 2-

• 1-

How many electrons does phosphorus gain to complete its outer shell?

• Two

• Four

• One

• Three

What is the total charge of three magnesium ions?

• 12+

• 9+

• 6+

• 3+

How do the charges of magnesium and phosphorus ions balance in magnesium phosphide?

• 3 magnesium ions and 2 phosphorus ions

• 1 magnesium ion and 1 phosphorus ion

• 4 magnesium ions and 3 phosphorus ions

• 2 magnesium ions and 3 phosphorus ions

What is the naming convention for the anion in an ionic compound?

• Use the elemental name with 'ide' suffix

• Use the elemental name

• Use the elemental name with 'ate' suffix

• Use the elemental name with 'ite' suffix

What is the name of the compound with magnesium and phosphorus?

• Magnesium phosphide

• Magnesium phosphate

• Magnesium phosphorate

• Magnesium phosphite

How can you determine the formula from the name 'magnesium phosphide'?

• By using the color of the compound

• By measuring the mass

• By counting the atoms

• By knowing the charges and balancing them