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Kelly's chem vocab
Chemistry
| Question | Answer |
|---|---|
| Law of Conservation of Mass | the mass of substances produced (products)by a chemical reaction is always equal to the mass of the reacting sudstances (reactants) |
| Phisical Change | A change from one state (solid, liquid, or gas) to another without changing chrmical composition |
| Chamical Change | any process determined by the atomic and moleculer composition and structure of the substances involved |
| Element | a pure chemical substance consisting of one type of atom distinguished by its atomic number |
| Chemical Formula | a representation of a substance using symbols for its constituent elements |
| Element (Diatomic) Molecule | Diatomic molecules are molecules composed only of two atoms, of either the same or different chemical elements |
| Chemical Equation | A symbolic representation of what happens when chemicals come in contact with one another |
| Chemical Reaction | 1.A process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction |
| Reactants (in a chemical equation) | Substances initially present in a chemical reaction that are consumed during the reaction to make products |
| Products (in a chemical equation) | The compounds that are formed when a reaction goes to completion. |
| Coefficient (in a chemical equation) | A coefficient is a number placed in front of a term in a chemical equation to indicate how many molecules (or atoms) take part in the reaction |
| Subscript (in a chemical equation) | the number of atoms of that kind there are in one molecule |
| Ionic compound | An ionic compound is a compound formed by ions bonding together through electrostatic forces |
| Covalent Compound | A covalent bond is a form of chemical bonding that is characterized by the sharing of pairs of electrons between atoms, and other covalent bonds |
| Metallic Compound | A metallic compound is a compound that contains one or more metal elements. |
| Synthesis | 2.The combination of ideas to form a theory or system. |
| Decomposition | Conversion or decay of degradable (or chemically unstable) material to simpler (or more stable) components or forms by the natural action of air, water, light, or microorganisms |
| Single Replacement | is a type of oxidation-reduction chemical reaction when an element or ion moves out of one compound and into another. (One element is replaced by another in a compound. |
| Double Replacement | a chemical reaction between two compounds where the positive ion of one compound is exchanged with the positive ion of another compound |
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