Unit#9 Chemical Reactions Pretest Deep Dive

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What is a combustion reaction?

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A combustion reaction is a chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light and heat. Example: CH₄ + 2O₂ → CO₂ + 2H₂O.

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What is a decomposition reaction?

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A decomposition reaction is a type of chemical reaction where one compound breaks down into two or more simpler products. It can be represented as AB → A + B.

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What is a synthesis reaction?

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A synthesis reaction is a chemical reaction in which two or more simple substances combine to form a more complex product. It can be represented as A + B → AB.

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What is a single replacement reaction?

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A single replacement reaction is a type of chemical reaction where one element replaces another in a compound. It can be represented as A + BC → AC + B.

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What is a double replacement reaction?

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A double replacement reaction is a chemical reaction where two compounds exchange ions or bonds to form two new compounds. It can be represented as AB + CD → AC + BD.

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What is nuclear fission?

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Nuclear fission is a nuclear reaction in which the nucleus of an atom splits into two or more smaller nuclei, along with the release of energy. It is commonly used in nuclear power plants.

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What is nuclear decay?

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Nuclear decay is the process by which an unstable atomic nucleus loses energy by emitting radiation, resulting in the transformation of the atom into a different element or isotope.

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What are isotopes?

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Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons, resulting in different atomic masses.

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What is the law of conservation of mass?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

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What is an exothermic reaction?

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An exothermic reaction is a chemical reaction that releases energy, usually in the form of heat, to its surroundings. Example: combustion of fuels.