Question | Answer |
States that matter is neither created nor destroyed. | Law of Conversion of Mass |
A change from one state (solid or liquid or gas) to another without a change in chemical composition. | Physical Change |
A change that occurs when one or more substances change into entirely new substances with different properties. | Chemical Change |
A substance that cannot be decomposed into simpler substances by chemical means. | Element |
A combination of chemical symbols and numbers to represent a substance | Chemical Formula |
A molecule composed only of two atoms of the same element. | Element (Diatomic) Molecule |
A molecule made of multiple different elements. | Compound Molecule |
A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products. | Chemical Equation |
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A process that changes one set of chemicals into another set of chemicals. | Chemical Reaction |
The elements or compounds that enter into a chemical reaction. | Reactants (in a chemical equation) |
The elements or compounds produced by a chemical reaction. | Products (in a chemical equation) |
A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction. | Coefficient (in a chemical equation) |
A number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound | Subscript (in a chemical equation) |
A compound that consists of positive and negative ions. | Ionic Compound |
A chemical compound formed by the sharing of electrons | Covalent Compound |
The attraction between positive and negative electrons and their properties are conductivity and reactivity | Metallic Compound |
A chemical reaction in which two or more simple substances combine to form a new, more complex substance | Synthesis |
A chemical reaction that breaks down compounds into simpler products | Decomposition |
When one element replaces another element in a compound | Single Replacement |
A chemical reaction where two elements in different compounds trade places | Double Replacement |