Grade 10 · Science · Chemistry

10th grade Name ionic compounds, including polyatomic ions worksheet

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Name ionic compounds, including polyatomic ions

Grade 10 Science Worksheet - Challenge Me

NameDate

Circle the best answer, or write your answer on the line.

A sample holds 5 formula units of calcium nitrate. Each has 2 nitrate ions of 3 oxygens. How many oxygen atoms does the sample hold, Ari?
A sample holds 4 formula units of aluminum sulfate. Each has 3 sulfate ions of 4 oxygens. How many oxygen atoms does the sample hold, Bo?
A sample holds 10 formula units of calcium phosphate. Each has 2 phosphate ions of 4 oxygens. How many oxygen atoms does the sample hold, Esme?
4.
What is the name of FeO, Jun?
- Iron(II) oxide
- Iron(III) oxide
- Iron(I) oxide
5.
What is the name of Fe₂O₃, rust, Kira?
- Diiron trioxide
- Iron(II) oxide
- Iron(III) oxide
6.
Noah names CaCO₃ calcium carbide. Agree or disagree?
- Agree: carbon makes carbide
- Agree: -ide ends anion names
- Disagree: CO₃ is carbonate
7.
Pia names NaCl sodium(I) chloride. Agree or disagree?
- Agree: it shows one sodium
- Agree: numerals go on metals
- Disagree: sodium has one charge
8.
What is the formula of aluminum sulfate, Ren?
- Al₂(SO₄)₃
- AlSO₄
- Al₃(SO₄)₂
9.
What is the formula of ammonium chloride, Tala?
- (NH₄)₂Cl
- NH₄Cl₂
- NH₄Cl
10.
What is the formula of calcium phosphate, Zee?
- CaPO₄
- Ca₃(PO₄)₂
- Ca₂(PO₄)₃

Name ionic compounds, including polyatomic ions. Every version has 10 questions, and the answer key prints on the second page.

I can name binary ionic compounds: cation, then anion with -ide (sodium chloride).
I can name compounds with common polyatomic ions: carbonate, hydrogen carbonate, nitrate, sulfate, phosphate, hydroxide, ammonium.
I can use Roman numerals for transition-metal charges (iron(III) oxide).
I can count atoms in formulas with brackets, and write formulas from names.

Standard: none (TX)

polyatomic ion: A group of atoms with one shared charge, like NO₃⁻

-ide: The ending for a one-element anion, like chloride

Roman numeral: Shows a transition metal ion's charge, as in iron(III)

brackets: Show more than one polyatomic ion in a formula

formula unit: The smallest ratio of ions in an ionic compound

Your child added the counts. Each polyatomic ion brings its own oxygens, so multiply: ions × oxygens per ion.

Your child counted the polyatomic ion once. The subscript outside the brackets multiplies every atom inside.

Your child left out the number of polyatomic ions per unit. Oxygens = units × ions per unit × oxygens per ion.

What is the most common mistake with name ionic compounds, including polyatomic ions?

Your child added the counts. Each polyatomic ion brings its own oxygens, so multiply: ions × oxygens per ion.

Are these 10th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

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