Free Grade 10 Chemistry Worksheets with Answers

Grade 10 Atomic Structure & Isotopes

HS-PS1-1

Finding protons, neutrons and electrons from atomic number, mass number and charge.

e.g. Sulfur-32 has atomic number 16. How many neutrons does it have?

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Grade 10 Atoms & Elements

HS-PS1-1

Protons, neutrons and electrons, and how atoms make up elements.

e.g. Which particle in an atom has a negative charge?

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Grade 10 Electron Shells & Valence Electrons

HS-PS1-1

Arranging electrons in shells for the first 20 elements and finding valence electrons.

e.g. How many valence electrons does lithium (Li, atomic number 3) have?

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Grade 10 Periodic Table Groups & Trends

HS-PS1-2

Groups, periods and trends in atomic radius, ionization energy and electronegativity.

e.g. Which element is the most electronegative?

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Grade 10 Ionic, Covalent & Metallic Bonds

HS-PS1-3

How atoms bond by transferring or sharing electrons, and the properties that result.

e.g. Covalent bonds usually form between which types of elements?

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Grade 10 Compounds & Molecules

HS-PS1-2

How elements combine into compounds and molecules, and reading chemical formulas.

e.g. What type of bond forms when electrons are transferred, as in NaCl?

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Grade 10 Balancing Chemical Equations

HS-PS1-7

Using coefficients to balance chemical equations so atoms are conserved.

e.g. Balance the equation: Mg + O₂ → MgO

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Grade 10 Types of Chemical Reactions

HS-PS1-2

Synthesis, decomposition, single and double replacement and combustion reactions.

e.g. Reaction type? CH₄ + 2O₂ → CO₂ + 2H₂O

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Grade 10 Chemical Reactions

HS-PS1-4

Reactants and products, types of chemical reactions, and signs that a reaction has happened.

e.g. Is baking a cake a physical change or a chemical change?

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Grade 10 Moles & Molar Mass

HS-PS1-7

Calculating molar mass and converting between grams and moles.

e.g. What is the mass of 3 mol of HCl? (H = 1, Cl = 35.5)

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Grade 10 Solution Concentration (Molarity)

HS-PS1-5

Calculating molarity and how much solute is needed to make a solution.

e.g. 3 mol of solute is dissolved to make 0.5 L of solution. What is the molarity?

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Grade 10 Acids, Bases & pH

HS-PS1-6

The pH scale, properties of acids and bases, neutralization and calculating pH.

e.g. Acids release which ion in water?

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Grade 10 Gas Laws

HS-PS3-2

Boyle's and Charles's laws for how gas pressure, volume and temperature are related.

e.g. A gas at 200 kPa has a volume of 10 L. At constant temperature, the volume grows to 40 L. What is the new pressure?

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Grade 10 Radioactivity & Half-Life

AdvancedHS-PS1-8

Calculating how much of a radioactive sample remains, and dating with half-lives.

e.g. A sample with a half-life of 5730 years drops from 400 g to 100 g. How much time has passed?

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Grade 10 Challenge: Think Like a Scientist

Challenge

Surprising questions and thought experiments that test real scientific reasoning.

e.g. Why is the sky blue?

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