Ionic Compounds and Their Formulas

The video tutorial explains how to write the formula for barium phosphide. It begins by identifying the element symbols for barium and phosphorus, noting their charges from the periodic table. The tutorial then uses the crisscross method to determine the correct formula, Ba3P2, ensuring the charges balance to zero. The process is verified by recalculating the charges to confirm the formula's accuracy.

What does the 'ide' suffix in barium phosphide indicate?

• It indicates a neutral compound.

• It indicates a polyatomic ion.

• It indicates a single phosphorus atom.

• It indicates a metal element.

What type of compound is barium phosphide?

• Molecular compound

• Metallic compound

• Ionic compound

• Covalent compound

What is the ionic charge of barium in barium phosphide?

• 1+

• 4+

• 2+

• 3+

What is the ionic charge of phosphorus in barium phosphide?

• 1-

• 2-

• 3-

• 4-

Why must the charges in barium phosphide add up to zero?

• Because it is a polyatomic ion.

• Because it is a metallic compound.

• Because it is a neutral compound.

• Because it is a covalent compound.

What method is used to determine the formula for barium phosphide?

• Substitution method

• Crisscross method

• Addition method

• Balancing method

What is the formula for barium phosphide?

• Ba3P2

• BaP2

• BaP

• Ba2P3

How do you verify the formula for barium phosphide?

• By comparing with other compounds.

• By ensuring the charges balance to zero.

• By checking the atomic mass.

• By using a chemical equation.

What is the total positive charge in the formula Ba3P2?

• 4+

• 8+

• 2+

• 6+