Free Printable WorksheetScienceGrade 9Science CurriculumNGSS HS-PS1-1, HS-PS1-2

9.27 Periodic Trends and Reactivity Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Physical Science with Earth and Science Science worksheet provides structured practice on 9.27 Periodic Trends and Reactivity. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Periodic Trends and Reactivity: MCQ focus: predict relative reactivity, atomic size trends, metallic character, and likely bonding behavior using table patterns. Aligned to NGSS high school Physical Science, Earth and Space Science, and Engineering Design; NRC/DCI; SEP/CCC; CCSS math/literacy connections; selected CA NGSS, NYSSLS, Florida CPALMS, and Texas TEKS references NGSS HS-PS1-1, HS-PS1-2 - NGSS-aligned Periodic Trends and Reactivity: NGSS: HS-PS1-1; HS-PS1-2; NRC/DCI: PS1.A-B; SEP/CCC: Analyzing patterns / Patterns; Common: HSN-Q.A; RST.9-10.7; State refs: CA/NYSSLS same HS-PS PE family; FL SC.912.P.8; TX IPC matter strand.

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

Physical Science with Earth and Science

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 9.27 Periodic Trends and Reactivity skill assessments:

Problem 1Difficulty: Mastery

A new element is placed in Group 1, Period 7. Which prediction is strongest without overextending the periodic table model?

AIts exact reaction rate with every substance can be calculated from group number alone.

BIt is likely a very reactive metal that forms +1 ions, but exact reaction behavior would still require evidence.

CIt must be completely unreactive because all Period 7 elements are noble gases.

DIt must form -1 ions because it is in the first column.

Solution & Explanation:Group 1 position supports predictions about metal character and +1 ion formation, but periodic trends are models and do not give every exact reaction detail by themselves.

Problem 2Difficulty: Mastery

Which reasoning best supports the prediction that bromine is less reactive than chlorine as a halogen?

ABromine is a noble gas and already has a filled valence shell.

BChlorine is a metal and bromine is a nonmetal.

CBromine is higher in Group 17, so it has fewer energy levels than chlorine.

DBromine is lower in Group 17, so its larger atom attracts an added electron less strongly.

Solution & Explanation:Halogen reactivity decreases down Group 17 because increased radius and shielding weaken attraction for an added electron. Bromine is below chlorine.

Problem 3Difficulty: Mastery

Which pair is most likely to form covalent compounds with oxygen rather than simple ionic salts?

ALithium and strontium

BCalcium and magnesium

CCarbon and sulfur

DSodium and potassium

Solution & Explanation:Carbon and sulfur are nonmetals, so they commonly share electrons with oxygen in covalent compounds. The other pairs are metals that more often form ionic oxides.

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Physical Science with Earth and Science Science students. It aligns with educational standard NGSS HS-PS1-1, HS-PS1-2 (NGSS: HS-PS1-1; HS-PS1-2; NRC/DCI: PS1.A-B; SEP/CCC: Analyzing patterns / Patterns; Common: HSN-Q.A; RST.9-10.7; State refs: CA/NYSSLS same HS-PS PE family; FL SC.912.P.8; TX IPC matter strand.).