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Chemical Reaction: Chemical Change definitions

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  • Chemical Reaction
    Process where chemical bonds in substances are broken and new bonds are formed, resulting in new substances with different properties.
  • Chemical Change
    Transformation resulting in the formation of one or more new substances, often indicated by observable evidence.
  • Chemical Bond
    Attractive force holding atoms together within molecules or compounds, which can be broken or formed during reactions.
  • Reactant
    Substance present at the start of a reaction that undergoes change to yield new substances.
  • Product
    Substance formed as a result of a chemical reaction, differing in composition from the starting materials.
  • Chemical Equation
    Representation using formulas and symbols to show the substances involved and the changes occurring in a reaction.
  • Reaction Arrow
    Symbol in an equation indicating the direction in which reactants are converted to products.
  • Precipitate
    Solid formed from a solution during a chemical reaction, often visible as a new phase.
  • Aqueous
    State where a compound is dissolved in water, resulting in a solution with the compound surrounded by water molecules.
  • Solid
    State of matter characterized by definite shape and volume, often represented by 's' in equations.
  • Liquid
    State of matter with definite volume but no fixed shape, denoted by 'l' in chemical equations.
  • Gas
    State of matter with neither definite shape nor volume, represented by 'g' in chemical equations.
  • Triangle Symbol
    Notation in equations indicating that heat is required or involved in the chemical reaction.
  • Observable Evidence
    Signs such as color change, gas formation, precipitate, or temperature change that indicate a reaction has occurred.