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science vocab. (cr)
scince vocabulary for Lannom P.4
Question | Answer |
---|---|
Physical change | A physical change is a type of change in which the form of matter is altered but one substance is not transformed into another. |
Chemical change | A physical change is a type of change in which the form of matter is altered but one substance is not transformed into another. |
Element | Substance that cannot be broken down into simpler substances. |
Chemical Formula | Representation of a substance using symbols for its constituent elements. |
Element (Diatomic) Molecule | are molecules composed only of two atoms, of either the same or different chemical elements. |
Compound Molecule | Is made up of more than one element. |
Chemical Equation | Short hand form for writing what reactants are used and what products are formed in a chemical reation. Sometimes shows whether energy is produced or absorbed. |
Chemical Reaction | Process that produces chemilcal change resulting in new substances that have properties different from those of the original substances. |
Reactants (in a chemical equation | Substance that exists before a chemical reaction begins. |
Products (in a chemical equation) | Substance that forms as a result of a chemical reaction. |
Coefficient (in a chemical equation) | The number of molecules of reactants or products. |
Subscript (in a chemcal equation) | The number of molecules of reactants or products. |
Law of Conservation of mass | The mass of substances produced (products by a chemical reaction is always equal to the mass of the reacting substances (reactants) |