Ionic Charges and Chemical Formulas

The video tutorial explains how to write the chemical formula for mercury II phosphide. It begins by identifying mercury as a transition metal with a 2+ charge and phosphorus as having a 3- charge. The tutorial uses the periodic table to confirm these charges. It then demonstrates the crisscross method to balance the charges, resulting in the formula Hg3P2. The tutorial concludes by verifying the formula through charge calculations, ensuring the compound is neutral.

What does the Roman numeral II indicate in Mercury(II) Phosphide?

• The number of mercury atoms

• The group number of mercury

• The atomic number of mercury

• The ionic charge of mercury

Which element is the phosphide ion derived from?

• Oxygen

• Phosphorus

• Nitrogen

• Sulfur

What is the ionic charge of the phosphide ion?

• 2-

• 1-

• 2+

• 3-

Why must the charges in Mercury(II) Phosphide add up to zero?

• Because it is a compound

• Because it is a metal

• Because it is an ion

• Because it is a neutral compound

What method is used to balance the charges in Mercury(II) Phosphide?

• Crisscross method

• Balancing method

• Periodic method

• Charge method

What is the chemical formula for Mercury(II) Phosphide?

• HgP

• Hg3P2

• Hg2P3

• Hg2P

How do the charges of mercury and phosphide ions contribute to the neutrality of Mercury(II) Phosphide?

• They both have positive charges

• They both have negative charges

• Their charges cancel each other out

• Their charges are not related

What is the total positive charge contributed by mercury ions in the formula?

• 4+

• 6+

• 2+

• 3+