Free Printable WorksheetScienceGrade 11Science CurriculumNGSS HS-PS1-1; AP Chem Unit 1; Pre-AP Unit 1; CCSS HSN-Q.A.1-3 and RST.11-12.1

11.21 Chemical Families and Reactivity Patterns Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Chemistry Science worksheet provides structured practice on 11.21 Chemical Families and Reactivity Patterns. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Chemical Families and Reactivity Patterns: Compare alkali metals, alkaline earth metals, halogens, noble gases, transition metals, and metalloids using valence electrons and reactivity patterns. Aligned to NGSS, CCSS, AP Chemistry/Pre-AP Chemistry, and representative state chemistry framework crosswalks NGSS HS-PS1-1; AP Chem Unit 1; Pre-AP Unit 1; CCSS HSN-Q.A.1-3 and RST.11-12.1 - Chemical Families and Reactivity Patterns Chemistry Standards Crosswalk: National: NGSS HS-PS1-1; AP Chem Unit 1; Pre-AP Unit 1; CCSS HSN-Q.A.1-3 and RST.11-12.1. State frameworks: TX TEKS 112.43(c)(5)-(6); MA HS.CHEM.1.1; FL SC.912.P.8.3-8.4; CA/NY/NJ HS-PS1-1; GA Chemistry atomic-structure standards; VA Chemistry atomic theory 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 11.21 Chemical Families and Reactivity Patterns skill assessments:

Problem 1Difficulty: Mastery

Use the evidence table for unknowns A through F. Which classification set is best supported?

AA noble gas, B halogen, C alkali metal, D transition metal, E metalloid, F alkaline earth metal

BA halogen, B noble gas, C metalloid, D alkali metal, E alkaline earth metal, F transition metal

CA transition metal, B metalloid, C noble gas, D halogen, E alkali metal, F alkaline earth metal

DA alkali metal, B alkaline earth metal, C halogen, D noble gas, E transition metal, F metalloid

Solution & Explanation:Each unknown matches a major family clue: A has one valence electron, B forms +2 ions, C has seven valence electrons, D has a full shell, E has variable colored ions, and F is a semiconductor near the stair-step.

Problem 2Difficulty: Mastery

Which combined ranking best matches both alkali metal and halogen family trends?

AAlkali metal reactivity: K < Na < Li; halogen reactivity: Br2 > Cl2 > F2

BAlkali metal reactivity: Li = Na = K; halogen reactivity: F2 = Cl2 = Br2

CAlkali metal reactivity: Li < Na < K; halogen reactivity: F2 > Cl2 > Br2

DAlkali metal reactivity: Na < K < Li; halogen reactivity: Cl2 > F2 > Br2

Solution & Explanation:Alkali metal reactivity increases down Group 1, while halogen reactivity decreases down Group 17.

Problem 3Difficulty: Mastery

Why are halogens treated as oxidizing substances in many chemical contexts?

AHalogens are oxidizing because they are metals that lose electrons easily.

BHalogen atoms can gain electrons to form halide ions, oxidizing the species that loses electrons.

CHalogens are oxidizing because they have full valence shells and never change.

DHalogens are oxidizing because they contain no valence electrons.

Solution & Explanation:Halogens tend to gain one electron. When they take electrons from another species, that other species is oxidized.

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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; AP Chem Unit 1; Pre-AP Unit 1; CCSS HSN-Q.A.1-3 and RST.11-12.1 (National: NGSS HS-PS1-1; AP Chem Unit 1; Pre-AP Unit 1; CCSS HSN-Q.A.1-3 and RST.11-12.1. State frameworks: TX TEKS 112.43(c)(5)-(6); MA HS.CHEM.1.1; FL SC.912.P.8.3-8.4; CA/NY/NJ HS-PS1-1; GA Chemistry atomic-structure standards; VA Chemistry atomic theory standards.).