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Turn chemistry notes into a quiz on elements, compounds and mixtures

Upload your lecture slides or class notes and get practice questions that test whether you can tell the three kinds of matter apart, with an explanation for every answer.

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Why sort matter into elements, compounds and mixtures

Sorting matter into elements, compounds and mixtures is a core unit in middle school and first-year chemistry, and a chemistry quiz on elements, compounds and mixtures is one of the quickest ways to find out whether the differences have stuck. Upload your lecture slides or notes and DeckOwl writes multiple-choice, true/false or short-answer questions, each with an explanation of why the answer is correct.

Elements contain only one kind of atom, such as iron or oxygen gas, and cannot be broken down by chemical reactions.
Compounds contain two or more elements chemically bonded in a fixed ratio, such as water (H2O) or sodium chloride.
Mixtures combine substances physically without chemical bonding, so their proportions can vary and the parts can be separated by physical means.
Solutions, such as salt dissolved in water, are mixtures that look uniform throughout, which is a common source of exam mistakes.

Example chemistry quiz questions on elements, compounds and mixtures

Is water (H2O) an element or a compound?Compound. It contains hydrogen and oxygen chemically bonded in a fixed 2:1 ratio.

Is air an element, a compound or a mixture?Mixture. Nitrogen, oxygen, argon and other gases are physically combined in variable amounts.

True or false: a compound can be separated into its elements by physical methods alone.False. The elements in a compound are chemically bonded, so separating them requires a chemical reaction.

Which of these is an element: iron (Fe), iron oxide (Fe2O3), or a mix of sand and iron filings?Iron (Fe). It is made of only one kind of atom, while the others contain more than one element or are mixtures.

Is salt dissolved in water a compound or a mixture?Mixture. The salt and water are not chemically bonded, so the proportions can vary and evaporation can recover the salt.

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Questions from your own material

Upload a PDF, DOCX, slide deck, plain text notes or a photo of a textbook page, and the quiz is built from what your class actually covered.

Multiple-choice, true/false and short answer

Mix question types so you practice recognizing an element, spotting a compound in a list, and explaining why a mixture is not a compound.

An explanation for every answer

Each question shows why the correct answer is right, so a wrong guess about a solution or an alloy becomes a lesson rather than a lost point.

How it works

Upload your notes or slides

Add the chapter on matter, a lab handout, or a photo of the page. Text is read from images as well as documents.

Choose a question type

Pick multiple-choice, true/false or short answer, or combine them in one quiz.

Answer, check, and repeat

Work through the questions, read the explanations for anything you missed, and generate a fresh set from the same material.

Explanations matter most here because the confusing cases are subtle. Students often call saltwater a compound when it is a mixture, or think air is a single substance. Seeing the reasoning behind each answer shows you which idea you mixed up, and generating a new set from the same notes gives you fresh practice before an exam.

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Frequently asked questions

How can I tell an element from a compound?

An element contains only one kind of atom, such as oxygen or iron. A compound contains two or more elements chemically bonded in a fixed ratio, such as water or table salt.

How many practice questions should I do on mixtures before a test?

Start with about 10 questions covering homogeneous and heterogeneous mixtures, then keep going until you can explain each answer without looking. Review every question you miss before moving on.

Can I export the quiz to other tools?

PDF and DOCX export are included in the Plus plan, and QTI 2.1 and Moodle XML export are available on Pro. The free plan lets you study in the browser without exports.

Do I need a credit card to try it?

No. You can start on the free plan with 3 generations per month, and students get 40% off with a school email.

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