Mastering Polyatomic Ions: Memorization Techniques

Which of the following is the correct formula for ammonium?

• NH4+

• NH3-

• NH2+

• NH5-

What is the formula for dichromate?

• Cr2O7--

• CrO4-

• Cr2O7-

• CrO3--

According to the rule '8 is bigger than 8', which ion has more oxygen atoms?

• Hypochlorite

• Chlorate

• Perchlorate

• Chlorite

If nitrate is NO3-, what is the formula for nitrite?

• NO2-

• NO4-

• NO3--

• NO2+

What does the prefix 'per' indicate in polyatomic ions?

• No change in oxygen

• One less oxygen

• One more oxygen

• Two more oxygens

Which of the following is the correct formula for perchlorate?

• ClO3-

• ClO2-

• ClO4-

• ClO-

What does the prefix 'hypo' signify in polyatomic ions?

• No change in oxygen

• Two less oxygens

• One more oxygen

• One less oxygen

If bromite is BrO2-, what is the formula for hypobromite?

• BrO3-

• BrO-

• BrO4-

• BrO2+

Which suffix indicates a single monatomic ion?

• ide

• ite

• per

• ate

Which of the following is NOT a polyatomic ion?

• Phosphate

• Sulfate

• Chloride

• Nitrate