Unlock hundreds more features
Save your Quiz to the Dashboard
View and Export Results
Use AI to Create Quizzes and Analyse Results

OR
Sign inSign in with Facebook
Sign inSign in with Google
Quizzes > High School Quizzes > Science

Ionic Compound Formula Practice Quiz

Master ionic compound names and formulas with ease

Difficulty: Moderate
Grade: Grade 10
Study OutcomesCheat Sheet
Paper art representing Ionic Formula Frenzy, a trivia game for high school chemistry students.

This ionic compound quiz helps you practice naming ions and writing correct formulas for ionic compounds. Answer 20 clear questions to review charges, polyatomic ions, and Roman numerals, and spot any gaps before the exam. It's quick, simple, and made for practice, so you can learn as you play and feel more ready for class.

What is the correct formula for sodium chloride?
Na2Cl2
Na2Cl
NaCl2
NaCl
NaCl is the correct formula because sodium ions (Na+) and chloride ions (Cl-) combine in a 1:1 ratio to achieve charge neutrality. The other formulas propose incorrect ratios of the ions.
What is the correct formula for magnesium nitride?
MgN
Mg2N3
Mg3N2
MgN2
Magnesium nitride is correctly written as Mg3N2 because magnesium forms a +2 ion and nitride a -3 ion. Three Mg2+ ions combine with two N3- ions to balance the overall charge.
Which of the following is the correctly written formula for aluminum oxide?
AlO3
Al3O2
Al2O3
AlO
Al2O3 is correct because two Al3+ ions (total +6) balance with three O2- ions (total -6) to yield a neutral compound. The other options do not reflect the proper ion count needed for neutrality.
What is the formula for potassium bromide?
KBr
KBr2
K2Br
K2Br2
Potassium bromide is formulated as KBr because potassium (K+) and bromide (Br-) combine in a 1:1 ratio to achieve electrical neutrality. The other formulas imply incorrect ratios of the ions.
Determine the correct formula for calcium sulfide.
Ca2S
Ca2S3
CaS
CaS2
Calcium sulfide is written as CaS because the Ca2+ ion and the S2- ion balance each other in a 1:1 ratio. The other options do not provide the correct balance of charges.
What is the correct chemical formula for iron(III) oxide?
Fe2O3
Fe3O2
FeO
FeO3
Fe2O3 is formed by combining two Fe3+ ions (total positive charge +6) with three O2- ions (total negative charge -6) to yield a neutral compound. The other formulas do not reflect the correct stoichiometry needed for charge balance.
Identify the proper formula for copper(I) sulfide.
Cu2S
Cu2S3
CuS
CuS2
Copper(I) sulfide is correctly written as Cu2S because two copper ions (each with a +1 charge) are needed to balance the -2 charge of the sulfide ion. The other options do not maintain the necessary charge neutrality.
What is the correct formula for aluminum sulfide?
Al2S3
AlS3
Al3S2
AlS
Aluminum sulfide is written as Al2S3 because two Al3+ ions (total +6) combine with three S2- ions (total -6) to achieve neutrality. The other formulas suggest an incorrect balance of ions.
Determine the correct formula for the compound formed by calcium and phosphate ions.
Ca2(PO4)3
CaPO4
Ca(PO4)2
Ca3(PO4)2
Calcium (Ca2+) and phosphate (PO4^3-) combine in a ratio that requires three calcium ions and two phosphate ions to balance the charges, resulting in Ca3(PO4)2. Parentheses are used to group the polyatomic phosphate ion correctly.
What is the formula for ammonium chloride?
NCl
NH3Cl
NH4Cl2
NH4Cl
Ammonium chloride is correctly written as NH4Cl because the ammonium ion (NH4+) and the chloride ion (Cl-) combine in a 1:1 ratio. The other options do not accurately represent the composition of the compound.
Which formula represents the compound formed by zinc and oxide?
ZnO2
ZnO
Zn2O
Zn2O3
Zinc oxide is written as ZnO because zinc (Zn2+) and oxide (O2-) combine in a 1:1 ratio to achieve neutrality. The other options suggest an incorrect stoichiometric relationship between the ions.
Determine the correct formula for magnesium phosphate.
Mg(PO4)2
Mg2(PO4)3
Mg3(PO4)
Mg3(PO4)2
Magnesium phosphate is formed by balancing three Mg2+ ions (total +6) with two phosphate ions (total -6), resulting in Mg3(PO4)2. The use of parentheses indicates that phosphate is a polyatomic ion and the ratios must reflect overall charge balance.
What is the proper way to write the formula for iron(II) sulfate?
Fe2S2O8
Fe2(SO4)2
FeSO42
FeSO4
Iron(II) sulfate is written as FeSO4 because the Fe2+ ion and the sulfate ion (SO4^2-) combine in a 1:1 ratio. The additional coefficients or groupings in the other options are unnecessary for achieving charge balance.
Select the correct formula for calcium carbonate.
Ca3(CO3)2
Ca2CO3
CaCO3
CaCO2
Calcium carbonate is correctly written as CaCO3 because calcium (Ca2+) and carbonate (CO3^2-) combine in a 1:1 ratio. The other formulas either include extra subscripts or incorrect groupings that do not balance the charges.
What is the correct formula for ammonium sulfate?
(NH4)SO4
NH3SO4
NH4SO4
(NH4)2SO4
Ammonium sulfate is written as (NH4)2SO4 because two ammonium ions (each +1) are needed to balance the -2 charge of the sulfate ion. Parentheses are used to enclose the ammonium ion, ensuring proper grouping.
Determine the correct formula for tin(II) sulfate.
Sn(SO4)2
SnSO4
Sn2(SO4)3
Sn2(SO4)
Tin(II) sulfate is formed from Sn2+ and the sulfate ion (SO4^2-), combining in a 1:1 ratio to yield SnSO4. The other options include extra subscripts or incorrect multipliers that do not correctly balance the charges.
Which of the following is the correct formula for the compound formed by barium and dichromate ions?
BaCrO7
Ba2Cr2O7
Ba2CrO7
BaCr2O7
Barium (Ba2+) and dichromate (Cr2O7^2-) ions combine in a 1:1 ratio because their charges are equal in magnitude but opposite in sign. The correct formula is BaCr2O7, which reflects the exact ion ratio, unlike the other options.
Find the correct formula for lithium phosphate.
Li3P2O8
LiPO4
Li2PO4
Li3PO4
Lithium phosphate is properly written as Li3PO4 because three Li+ ions (3 x +1 = +3) are required to balance the -3 charge on the phosphate ion (PO4^3-). This ensures the resulting compound is neutral.
What is the correct formula for potassium permanganate?
KMnO2
KMnO4
K3MnO4
K2MnO4
Potassium permanganate is composed of one potassium ion (K+) and one permanganate ion (MnO4-), resulting in the simple 1:1 formula KMnO4. The other formulas suggest an incorrect stoichiometry.
Determine the correct formula for the compound formed by cobalt(III) and phosphate ions.
Co(PO4)3
CoPO4
Co3(PO4)2
Co3(PO4)
Cobalt(III) ions (Co3+) and phosphate ions (PO4^3-) combine in a 1:1 ratio due to their equal and opposite charges, forming CoPO4. The alternatives incorrectly suggest different stoichiometric ratios that would not result in a neutral compound.
0
{"name":"What is the correct formula for sodium chloride?", "url":"https://www.quiz-maker.com/QPREVIEW","txt":"What is the correct formula for sodium chloride?, What is the correct formula for magnesium nitride?, Which of the following is the correctly written formula for aluminum oxide?","img":"https://www.quiz-maker.com/3012/images/ogquiz.png"}

Study Outcomes

  1. Identify common ions and their charges in ionic compounds.
  2. Construct chemical formulas using principles of charge neutrality.
  3. Analyze compound names to determine the correct ionic composition.
  4. Apply verification techniques to assess the accuracy of written formulas.
  5. Evaluate feedback to enhance understanding of ionic formula calculation.

Ionic Compound Quiz: Naming & Writing Cheat Sheet

  1. Understand ionic compounds - Ionic compounds form when positive cations and negative anions team up to create a neutral substance. Picture Na❺ high-fiving Cl❻ to make classic table salt, NaCl!
  2. Learn monatomic ion charges - The periodic table is your best friend when it comes to ion charges: Group 1 makes +1 ions, Group 2 makes +2, Group 17 makes - 1, and Group 16 makes - 2. Once you know the group, you know the charge - simple as that!
  3. Memorize polyatomic ions - Polyatomic ions like nitrate (NO₃❻), sulfate (SO₄²❻), and ammonium (NH₄❺) pop up everywhere in chemistry. Learning their names and charges by heart saves you tons of time.
  4. Use the crisscross method - Write the cation and anion with charges, then swap the magnitude of each charge to become the other's subscript. Finally, reduce to the simplest ratio - Al³❺ + O²❻ becomes Al₂O₃.
  5. Use parentheses for polyatomics - When more than one polyatomic ion is needed, wrap it in parentheses before adding the subscript. For instance, calcium nitrate is Ca(NO₃)₂, not CaNO₃₂!
  6. Account for transition metal states - Transition metals can have different oxidation states, so you'll see Roman numerals in names: iron(III) chloride is FeCl₃, while iron(II) chloride is FeCl₂. Keep that numeral game strong!
  7. Name monatomic ionic compounds - Combine the cation name with the anion name, switching the anion's ending to "-ide." So NaCl becomes sodium chloride and MgO is magnesium oxide.
  8. Name compounds with polyatomics - When a polyatomic ion is involved, just use its usual name - no "-ide" switch. For example, NaNO₃ is sodium nitrate, plain and simple.
  9. Balance total charges - Always check that the sum of positive and negative charges equals zero. Mg²❺ needs two Cl❻ to balance, giving you MgCl₂ - no charge leftover!
  10. Practice makes perfect - The more you write and name ionic compounds, the more natural it becomes. Use practice problems, quizzes, and fun flashcards to turn memorization into muscle memory.
Make a Quiz (FREE) Copy & Edit This Quiz Create a Quiz with AI

Science Quizzes

Powered by: Quiz Maker