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

11.14 Subatomic Particles, Ions, and Nuclear Notation Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Chemistry Science worksheet provides structured practice on 11.14 Subatomic Particles, Ions, and Nuclear Notation. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Subatomic Particles, Ions, and Nuclear Notation: Determine protons, neutrons, electrons, charge, mass number, atomic number, and isotope notation for atoms and ions. 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 - Subatomic Particles, Ions, and Nuclear Notation 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 11.14 Subatomic Particles, Ions, and Nuclear Notation skill assessments:

Problem 1Difficulty: Mastery

Why are ¹⁴_6C and ¹⁴_7N not isotopes of each other?

AThey have the same mass number, so they must be the same isotope.

BThey have different electron counts only.

CThey have the same number of neutrons and protons.

DThey have different atomic numbers, so they are different elements.

Solution & Explanation:Isotopes must have the same atomic number. Carbon-14 and nitrogen-14 have different proton counts, so they are different elements with the same mass number.

Problem 2Difficulty: Mastery

A neutral atom has mass number 52 and 28 neutrons. It loses 3 electrons. The element with atomic number 24 is chromium, Cr. Which ion is formed?

A⁵²_24Cr³-

B²⁸_24Cr³+

C⁵²_24Cr³+

D⁵²_21Cr³+

Solution & Explanation:Protons are 52 - 28 = 24, so the atom is chromium. Losing 3 electrons forms a 3+ ion without changing the nucleus.

Problem 3Difficulty: Mastery

An ion X²- has 36 electrons and mass number 78. The element with atomic number 34 is selenium, Se. Which description is correct?

Aselenium-78 with 36 neutrons

Bselenium-78 with 44 neutrons

Cbromine-78 with 43 neutrons

Dselenium-36 with 42 neutrons

Solution & Explanation:A 2- ion has two more electrons than protons, so protons = 36 - 2 = 34. Neutrons are 78 - 34 = 44.

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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; 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.).