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P. 6th Science Vocab
Science vocabulary
| Question | Answer |
|---|---|
| Law of Conservation of Mass | a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system |
| Physical Change | a change from one state (solid or liquid or gas) to another without a change in chemical composition |
| Chemical Change | a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance |
| Element | a process in which one or more substances are changed into one or more different substances. Is composed of atoms that have the same atomic number |
| Chemical Formula | a representation of a substance using symbols for its constituent elements |
| Element (Diatomic) Molecule | molecules composed only of two atoms, of either the same or different chemical elements |
| Compound Molecule | a compound made of 2 or more nonmetal elements; a compound held together by covalent bonds |
| Chemical Equation | a representation of a chemical reaction using symbols of the elements to indicate the amount of substance, usually in moles, of each reactant and product |
| Chemical Reaction | a process that involves changes in the structure and energy content of atoms, molecules, or ions but not their nuclei |
| Reactants (in a chemical equation) | They are on the left side of the equation with an arrow pointing to the substances being formed on the right side of the equation (the products) |
| Products (in a chemical equation) | a substance that is formed as the result of a chemical reaction. |
| Coefficient (in a chemical equation) | the absolute values of the stoichiometric numbers |
| Subscript (in a chemical equation0 | numbers used to tell you how many atoms of an element are present in the equation |
| Ionic Compound | a chemical compound in which ions are held together in a lattice structure by ionic bonds |
| Covalent Compound | a molecule formed by covalent bonds, in which the atoms share one or more pairs of valence electrons |
| Metallic Compound | a compound that contains one or more metal elements |
| Synthesis | The combining of separate elements or substances to form a coherent whole |
| Decomposition | Separation into constituents by chemical reaction |
| Single Replacement | A chemical reaction in which an element replaces one element in a compound |
| Double Replacement | a chemical reaction where two reactant ionic compounds exchange ions to form two new product compounds with the same ions |
Created by:
g0301219
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