Chemical reactions and more

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What is a chemical reaction?

Back

A process where substances (reactants) are transformed into different substances (products) through the breaking and forming of chemical bonds.

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What is the law of conservation of mass?

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In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

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What is a reactant?

Back

A substance that undergoes change during a chemical reaction.

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What is a product?

Back

A substance that is formed as a result of a chemical reaction.

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What is a balanced chemical equation?

Back

An equation where the number of atoms for each element is the same on both the reactant and product sides.

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What is a proton?

Back

A subatomic particle found in the nucleus of an atom, with a positive charge and a larger mass than an electron.

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What is a model in science?

Back

An object, diagram, or computer program that helps us understand something by making it simpler or easier to see.

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What is mass?

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A measure of the amount of matter in an object, typically measured in grams or kilograms.

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What is the difference between mass and weight?

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Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

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What is a chemical equation?

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A symbolic representation of a chemical reaction, showing the reactants and products along with their quantities.