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8 SC Bonds&Reactions
8th grade physical SC chemical bonds and reactions
Definition | Word |
---|---|
Substance that changes the rate of a chemical reaction without being used up or changed very much | Catalyst |
Solid that's produced as a result of a chemical reaction in a solution | Precipitate |
A substance or molecule that participates in a chemical reaction | Reactant |
A reaction in which 2 or more substances combine to form a new compound | Synthesis Reaction |
A combination of chemical symbols and numbers to represent a substance | Chemical Formula |
Process by which one or more substances change to produce one or more different substances | Chemical Reaction |
An electron that is found in the outermost shell of an atom and that determines the atom's chemical properties | Valence Electron |
An interaction that hold atoms or ions together | Chemical Bond |
Law that states that mass can't be created or destroyed in ordinary physical and chemical changes | Law of Conservation of Mass |
A chemical reaction that requires energy input | Endothermic Reaction |
The combining of atoms to form molecules or ionic compounds | Chemical Bonding |
A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products | Chemical Equation |
The regular pattern in which a crystal is arranged | Crystal Lattice |
The smallest unit of a substance that keeps all of the physical and chemical properties of that substance | Molecule |
A chemical reaction in which energy is released to the surroundings as heat | Exothermic Reaction |
A substance that forms in a chemical reaction | Product |
Law that states that energy can't be created or destroyed, but can be changed from one form to another | Law of Conservation of Energy |
Minimum amount of energy required to start a chemical reaction | Activation Energy |
Substance that stops or slows down a chemical reaction | Inhibitor |
A bond formed when atoms share one or more pairs of electrons | Covalent Bond |
A bond that forms when electrons are transferred from one atom to another, which results in a positive ion and a negative ion | Ionic Bond |
A bond formed by the attraction between positively charged metal ions and the electrons around them | Metallic Bond |
A reaction in which a gas, solid precipitate, or a molecular compound forms from the exchange of ions between 2 compounds | Double-Displacement Reaction |
A reaction in which a single compound breaks down to form 2 or more simpler substances | Decomposition Reaction |
A reaction in which one element takes the place of another element in a compound | Single-Displacement Reaction |
A charged particle that forms when an atom or group of atoms gains or loses one or more electrons | Ion |