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LANNOM VOCAB 2
science vocab
Question | Answer |
---|---|
Law of Conservation of Mass | The law stating that in a chemical reaction, matter is neither gained nor lost. |
Physical Change | A change in matter which does not alter the chemical properties of the matter. |
Chemical Change | A rearrangement of the atomic array of matter which results in a change of physical properties. |
Element | It is any substance that cannot be broken down to any other substance. |
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. |
Compound Molecule | A compound is a molecule that contains at least two different elements. All compounds are molecules but not all molecules are compounds. |
Chemical Equation | A symbolic representation of what happens when chemicals come in contact with one another. |
Chemical Reaction | Interactions in which atoms exchange or share electrons, forming new chemicals. |
Reactants (of a chemical equation) | Also called interact ant. any substance that undergoes a chemical change in a given reaction. |
Products | a substance obtained from another substance through chemical change. |
Coefficient | The number of molecules of reactants or products. |
Subscript | Refers to the small line of text in chemical formulas such as the 2 in H2O |