Free Printable WorksheetScienceGrade 11Science CurriculumNGSS HS-PS1-1, HS-PS1-7; AP Chem Units 1 and 4; Pre-AP Unit 3; CCSS HSN-Q.A.1-3 and MP6

11.25 Common Ions and Polyatomic Ions Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Chemistry Science worksheet provides structured practice on 11.25 Common Ions and Polyatomic Ions. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Common Ions and Polyatomic Ions: Recognize common monatomic and polyatomic ions, their charges, names, and formulas as a basis for writing compounds. Aligned to NGSS, CCSS, AP Chemistry/Pre-AP Chemistry, and representative state chemistry framework crosswalks NGSS HS-PS1-1, HS-PS1-7; AP Chem Units 1 and 4; Pre-AP Unit 3; CCSS HSN-Q.A.1-3 and MP6 - Common Ions and Polyatomic Ions Chemistry Standards Crosswalk: National: NGSS HS-PS1-1, HS-PS1-7; AP Chem Units 1 and 4; Pre-AP Unit 3; CCSS HSN-Q.A.1-3 and MP6. State frameworks: TX TEKS 112.43(c)(7)-(9); FL SC.912.P.8.7, P.8.9; MA HS-PS1-9(MA); GA Chemistry formula/stoichiometry standards; VA Chemistry nomenclature/mole standards.

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Chemistry

Subject

Science

Domain

Science Curriculum

Formats

PDF & DOCX

Sample Practice Problems

Preview the types of problems and questions covered in this worksheet

Below are sample questions representative of the exercises included on this worksheet and related 11.25 Common Ions and Polyatomic Ions skill assessments:

Problem 1Difficulty: Mastery

Which data-card entry is publishable for an ion reference list?

Ahypochlorite, ClO4^-, 1-, anion

Bhypochlorite, ClO^-, 1+, cation

Chypochlorite, Cl-, 1-, monatomic anion

Dhypochlorite, ClO^-, 1-, anion

Solution & Explanation:Hypochlorite is the polyatomic anion ClO^- with a 1- charge.

Problem 2Difficulty: Mastery

Which statement about subscripts and charges in common ion formulas is most accurate?

ASubscripts always show the charge of the ion.

BSuperscripts only show how many oxygen atoms are present.

CSubscripts show atom counts inside the ion; superscript signs and numbers show the ion charge.

DPolyatomic ions do not have overall charges.

Solution & Explanation:In formulas such as SO4²-, the 4 counts oxygen atoms and the 2- gives the overall ion charge.

Problem 3Difficulty: Mastery

Which selection contains a 1+ cation, a 2+ cation, a 1- anion, and a 2- anion in that order?

ANH4+, Na+, CO3²-, PO4³-

BNH4+, Ca²+, NO3^-, SO4²-

CK+, Mg²+, SO4²-, NO3^-

DAl³+, Ca²+, OH-, Cl-

Solution & Explanation:NH4+ is 1+, Ca²+ is 2+, NO3^- is 1-, and SO4²- is 2-.

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Frequently Asked Questions

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Chemistry Science students. It aligns with educational standard NGSS HS-PS1-1, HS-PS1-7; AP Chem Units 1 and 4; Pre-AP Unit 3; CCSS HSN-Q.A.1-3 and MP6 (National: NGSS HS-PS1-1, HS-PS1-7; AP Chem Units 1 and 4; Pre-AP Unit 3; CCSS HSN-Q.A.1-3 and MP6. State frameworks: TX TEKS 112.43(c)(7)-(9); FL SC.912.P.8.7, P.8.9; MA HS-PS1-9(MA); GA Chemistry formula/stoichiometry standards; VA Chemistry nomenclature/mole standards.).